# Mathematics Grade 12 Paper 1 NSC November 2022 Memo

> Grade 12 Mathematics Paper 1 memorandum from the NSC November Exam 2022, 21 pages. Read online or download the free PDF.

- Page: https://www.hlayiso.com/library/mathematics-p1-nov-2022-mg-afr-eng/6a8859ca-fd4a-4ae9-bff2-191793790aae
- Updated: 2026-10-29
- Subject: Mathematics
- Grade: Grade 12
- Document type: Memorandum
- Year: 2022
- Exam period: NSC November Exam
- Paper: 1
- Curriculum: CAPS
- Pages: 21

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Mathematics · Grade 12 · NSC November Exam · 2022. Memorandum. Read online or download the PDF.

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### Page 1

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                                       NATIONAL
                                  SENIOR CERTIFICATE/
                                   NASIONALE SENIOR
                                      SERTIFIKAAT

                                        GRADE 12/GRAAD 12

                             MATHEMATICS P1/WISKUNDE V1

                                         NOVEMBER 2022

                       MARKING GUIDELINES/NASIENRIGLYNE

MARKS/PUNTE: 150

                            These marking guidelines consist of 21 pages.
                             Hierdie nasienriglyne bestaan uit 21 bladsye.

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Mathematics P1/Wiskunde V1                             2                                  DBE/November 2022
                                    NSC/NSS – Marking Guidelines/Nasienriglyne

NOTE:
   If a candidate answers a question TWICE, only mark the FIRST attempt.
   Consistent Accuracy applies in all aspects of the marking guidelines.

LET WEL:
   Indien 'n kandidaat 'n vraag TWEE keer beantwoord, sien slegs die EERSTE poging na.
   Volgehoue akkuraatheid is DEURGAANS op ALLE aspekte van die nasienriglyne van
     toepassing.

QUESTION1/VRAAG 1

1.1.1        (3x  6)( x  2)  0                                         x2
             x  2 or        x  2                                        x  2                    (2)
1.1.2        2x 2  6x  1  0
                   b  b 2  4ac
             x
                        2a
                  6     6   4(2)(1)                                   correct substitution into
                             2

             x                                                             correct formula
                           2(2)
                                                                           2,82
             x  2,82     or x  0,18                                      0,18                     (3)
1.1.3        x  90  x
              2

             x2  x  90  0                                               standard form
             ( x  9)( x  10)  0
             CV: x   9        or    x  10                               critical values

                             –9            10

             x   9 or x  10                                             x   9 or x  10
             OR/OF                                                                                    (4)
             ( ;  9) or (10 ; )

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Mathematics P1/Wiskunde V1                              3                                  DBE/November 2022
                                     NSC/NSS – Marking Guidelines/Nasienriglyne

1.1.4        x  7 x  12

             x  12  7 x
                                                                            isolating the root
             x  122  7 x 
                                2
                                                                            squaring both sides

             x 2  24 x  144  49 x

             x 2  25x  144  0                                            standard form

             ( x  16)( x  9)  0

             x  16 or x  9                                                both answers             (4)

             OR/OF                                                         OR/OF
             x  7 x  12  0
                                                                            standard form
              x  3 x  4  0 or let            x k                    factors
               x  3 or      x 4                                           answers
             x  9 or x  16                                                both answers for x        (4)
1.2          2x  y  2

             y  2x  2      ………( 1 )                                       eq 1

             xy  4          ………( 2 )

             (1) in (2):
             x(2 x  2)  4                                                 substitution
             2x 2  2x  4  0                                              standard form
             x2  x  2  0
             ( x  2)( x  1)  0
             x  2 or x  1                                                x-values
             y2          y  4                                            y-values                  (5)

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Mathematics P1/Wiskunde V1                             4                                  DBE/November 2022
                                    NSC/NSS – Marking Guidelines/Nasienriglyne

             OR/OF                                                        OR/OF
             2x  y  2

                  1
             x     y 1      ………( 1 )                                     eq 1
                  2
             xy  4          ………( 2 )

             (1) in (2):

              1     
             y y  1  4
              2                                                          substitution

             1 2
               y  y40
             2                                                             standard form

             y2  2y  8  0

             ( y  4)( y  2)  0

             y   4 or y  2                                              y-values
             x  1        x2                                             x-values                  (5)
             OR/OF                                                        OR/OF
             2 x  y  2 ………( 1 )

                  4
             y             ………( 2 )                                       eq 2
                  x
             (2) in (1):

                    4                                                      substitution
             2x      2
                    x

             2 x2  2 x  4  0
                                                                           standard form
             x2  x  2  0

             ( x  2)( x  1)  0

             x  2 or x  1                                               x-values
             y2     y  4                                                y-values                  (5)

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Mathematics P1/Wiskunde V1                                5                                     DBE/November 2022
                                       NSC/NSS – Marking Guidelines/Nasienriglyne

             OR/OF                                                           OR/OF
             2 x  y  2 ………( 1 )

                  4
             x                  ………( 2 )                                     eq 2
                  y

             (2)in (1):
              4
             2   y  2                                                     substitution
               y
             8  y2  2 y  0
             y2  2 y  8  0                                                 standard form
             ( y  4)( y  2)  0

             y   4 or y  2                                                 y-values

             x  1          x2                                              x-values                   (5)
1.3          2.5 n  5n1  5n2  2.5 n  5n.51  5n.52                      exp law
                                5 n 2  5  25
                                    5 n 22                                common factor

             2  5n (11)                                                    answer/explanation          (3)

             OR/OF
             Any integer multiplied by an even number will be
             even
             3 y 1
1.4                  96 x
              32

             3 y 1                                                              3 y 1          x
                                                                                              
                             x
                      96  2                                                            96   2

              25                                                                  25

                             5x    x
             3 y 1.2 5  2 2 .3 2
                                                                                                 5x   x
                                                                              3 y 1.2 5  2 2 .3 2
                   5x
             5 
                    2
              x  2                                                         x  2

                    x
             y 1 
                    2
                    2
             y 1 
                     2
              y  2                                                              y  2                (4)

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Mathematics P1/Wiskunde V1                           6                                      DBE/November 2022
                                  NSC/NSS – Marking Guidelines/Nasienriglyne

             OR/OF                                                      OR/OF
             3 y 1
                     96 x
              32

                                                                                                     
                                                                                   2
                                                                          3 y 1 
                                 
                    2                                                                                     2
              3 y 1             2
                                                                         5               (96) x
              5   (96)
                                 x

              2                                                         2 
             32 y  2
                 10
                        25 x.3x
               2
               2 y  2 10
             3 .2  25 x.3x                                              32 y 2.210  25 x.3x
             10  5 x
              x  2                                                    x  2

             2 y  2  2
              y  2                                                         y  2                          (4)

                                                                                                              [25]

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Mathematics P1/Wiskunde V1                          7                                  DBE/November 2022
                                 NSC/NSS – Marking Guidelines/Nasienriglyne

QUESTION 2/VRAAG 2

2.1.1       a  14
            T6  14r 5  448                                            T6  14r 5  448
                    r 5  32            Answer only: full marks
                  r  2                                               r=2                        (2)
2.1.2       Tn  14(2)n1

                 14(26  1)                                             substitution into correct
            Sn                                                          formula
                   2 1
            S6  882                                                    S6  882

            114 674 – 882 = 113 792

            113 792  896  2n  1

            128  2n                                                    128  2n

            n=7                                                        7                          (4)

            OR/OF                                                      OR/OF
                  a( r n  1 )
            Sn 
                     r 1
                         14( 2 n  1 )                                  substitution into correct
            114 674 
                            2 1                                         formula
            8 191  2  1
                       n

            2 n  8 192                                                 2 n  8 192
            n  log 2 8 192
            n = 13                                                      n = 13
             7 more terms must be added to the first 6 terms.         7                          (4)
                 1                                                            1
2.1.3       r                   OR        448r 5  14                 r 
                 2                                                            2
                                                     1
                                              r 
                                                     2
                    a
            S 
                  1 r
                   448
            S                                                         substitution
                      1
                  1
                      2
            S   896                                                   answer                    (3)

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Mathematics P1/Wiskunde V1                          8                                   DBE/November 2022
                                 NSC/NSS – Marking Guidelines/Nasienriglyne

              k
                    1    1     1
              3 p  6   20 6
2.2
             p 0

              1         1 1 3                                                   1
            T1     T2                                               T1 
              6         3 6 6                                                   6
              3 1 1
            d                                                       d
              6 6 3

            121 n   1         1 
                2   n  1                                     substitution
             6  2  6          3 

            121    1 1   1
                 n  n  
             3     3 3   3

            121 1 2
                 n
             3    3
            121  n 2

            n = 11                                                      value of n
            k  10                                                     value of k                 (5)

            OR/OF                                                      OR/OF
              k
                    1    1     1
              3 p  6   20 6
             p 0

               1                                                                1
            a                                                          a
               6                                                                6
              1   1
            l k
              3   6                                                    l

            n  k 1                                                    n  k 1
            S n  a  l 
                 n
                 2

            121 k  1  1 1  1
                        k 
             6    2 6 3     6

            121 k  1  1   1
                        k 
             6    2 3      3

            121 k  1  k  1
               
             6    2  3 
            121 (k  1) 2
                 
             6         6                                                   121 (k  1) 2
                                                                             
            k  1   121                                                   6     6
            k  1  11
            k  10                                                      value of k                 (5)
                                                                                                    [14]

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Mathematics P1/Wiskunde V1                           9                                  DBE/November 2022
                                  NSC/NSS – Marking Guidelines/Nasienriglyne

QUESTION 3/VRAAG 3

3.1         3a  b  7                                                   3a  b  7
             3b  7                                                    3+b=7                      (2)
                 b4

            OR/OF                                                       OR/OF
            T2  T1  7                                                  T2  T1  7
            4  2b  9  (1  b  9)  7                                 substitution              (2)
            b=4
3.2          Tn  n 2  4n  9
            T60  ( 60 ) 2  4( 60 )  9                                 substitution
                                           Answer only: full marks
                 3849                                                   answer                    (2)
3.3         14 ; 21 ; 30 ; 41;
            First difference: 7 ; 9 ; 11 ; …                            first difference
            Common 2nd difference: 2                                    2

            Tp  2 p  5                   Answer only: full marks      2p  5                    (3)

            OR/OF                                                       OR/OF
            First difference: 7 ; 9 ; 11 ; …                            first difference
            Tn  a  n  1d
                T p  7   p  12                                   2
                Tp  2 p  5                                            2p  5                    (3)
3.4         157  2 p  5                                                157  2 p  5
            p  76                                                       p  76
             Between T76 and T77                                        T76 and T77               (3)

            OR/OF                                                       OR/OF

                                            Tn 1  Tn  157             Tn1  Tn  157
            (n  1) 2  4(n  1)  9  (n 2  4n  9)  157
            n 2  2n  1  4n  4  9  n 2  4n  9  157
                                                 2n  152
                                                   n  76                n  76
             Between T76 and T77                                        T76 and T77               (3)
                                                                                                   [10]

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Mathematics P1/Wiskunde V1                         10                                  DBE/November 2022
                                 NSC/NSS – Marking Guidelines/Nasienriglyne

QUESTION 4/VRAAG 4

4.1.1       p = – 1 and q = 2                                           p=–1 q=2                 (2)
4.1.2          1
                   20                                                 =0
             x 1
             2x  2  1
                 1
            x
                 2
            1      
             ; 0                                                       answer                   (2)
            2 
                 1
4.1.3       x  3                                                       –3
                 2
                 5                                                            5
                                   Answer only: full marks              x                      (2)
                  2                                                             2
4.1.4       y  xt                                                     subst (1 ; 2)
            2  1 t
            t 1                                                        t 1                      (2)
                      1
4.1.5       2
                   x 1            Answer only: full marks
                                                                            1
               1                                                               20
                  20                                                    x 1
             x 1                                                             1
                                                                        x
                                                                              2
                    1                                                    x 1
            x         or x  1                                                                   (3)
                    2
            OR/OF
                        1
            x     ;  or 1 ;  
                        2
4.2.1       y = –5                                                       answer                   (1)
4.2.2             b  (4)
            x                 2                                      x2
                  2a      2(1)
             f (2)  22  4(2)  5   9                                y9                      (2)
             D(2 ;  9 )

            OR/OF                                                       OR/OF
             f / ( x)  2 x  4
            2x  4  0
                    x2                                                 x2
            f (2)  22  4(2)  5   9                                 y9                      (2)
             D(2 ;  9 )

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Mathematics P1/Wiskunde V1                         11                                  DBE/November 2022
                                 NSC/NSS – Marking Guidelines/Nasienriglyne

4.2.3       q  5                                                       q  5
             9  a ( 2)  5
                        2                                                substitution of (2 ; – 9)
             4  4a
            a  1                                                       a  1
                                                                                                   (3)
             g ( x)  2 x  5
4.2.4       y  ( ;  5) OR           y  5 ; y  R                  answer                    (1)
4.2.5       k 9                                                       – 9
                                                                         k  9                   (2)
                                                                                                  [20]

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Mathematics P1/Wiskunde V1                         12                                  DBE/November 2022
                                 NSC/NSS – Marking Guidelines/Nasienriglyne

QUESTION 5/VRAAG 5

5.1         g( x )  2 x  6
            y6                                                         y=6                       (1)
5.2         y  2x  6
            x  2y  6                                                   swop x and y
                                        Answer only: Full marks
                 1                                                       equation
            y  x3                                                                                (2)
                 2
5.3         1
              x  3  2x  6                                            equating
            2
              x  6  4 x  12
                 3 x  18                                              x = – 6
                   x  6
                                                                        y= –6                     (3)
            A ( 6 ;  6)
            OR/OF                                                       OR/OF

            2x  6  x                                                  equating
            x6                                                        x = – 6
            y6                                                        y = – 6                  (3)
5.4         AB  (6) 2  (12) 2                                         substitution
                  180  6 5  13,42                                    answer                    (2)

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Mathematics P1/Wiskunde V1                           13                                  DBE/November 2022
                                   NSC/NSS – Marking Guidelines/Nasienriglyne

5.5         BC  62  62  72  6 2                                        BC
            AB = AC = 180          symmetry of g and g 1                  AB = AC /midpoint (3 ; 3)
                                        2
                              72 
             h  ( 180 )  
                             2
                                  
                                                                           h (A)
                               2 
                  162  9 2
                              1
            area of ABC  BC  h                                          substitution
                              2
                              1
                            72  162  54 units 2                        answer (A)               (5)
                              2

            OR/OF                                                         OR/OF
             tan BD̂C  2
             BD̂C  63,43                                                BD̂C  63,43
                       1
            tan DĈA 
                       2
             DĈA  26,57
                                                                           DÂC  36,86
             DÂC  36,86                      (ext angle triangle)
                                                                          AC = 180
            Area of ABC 
                                   1
                                   2
                                      180         
                                                180 sin 36,86             substitution into the
                                                                            correct formula
                                  53,99 units 2                           answer (A)            (5)

            OR/OF                                                         OR/OF
            Area of ∆ABC = Area of ∆BDC + Area of ∆ADC                     Areas (∆BDC+∆ADC)
                           1            1                                    1
                          DC.BO  DC.height                               DC.BO
                           2            2                                    2
                            1           1
                            9  6    9  6                          1
                                                                           DC.height
                            2           2                                   2
                           54 units  2
                                                                           substitution
                                                                           answer (A)      (5)
                                                                                           [13]

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Mathematics P1/Wiskunde V1                            14                                  DBE/November 2022
                                    NSC/NSS – Marking Guidelines/Nasienriglyne

QUESTION 6/VRAAG 6

6.1         A  P(1  i) n
                                            8
                               m                                         8
            13 459  12 0001    
                            400                                           subst into correct
                 m 
                       8                                                     formula
            1        1,121...
             400 
                 m 8
            1       1,121..                                              1 
                                                                                   m 8
                                                                                       1,121..
                400                                                               400
              m
                  0,0144...
            400
            m  5,78%                                                      5,78 %
                                                                                                      (4)
6.2
             F
                   
                x (1  i)  1
                           n
                               
                        i
                                                                             0,075
                       0,075 12                                        
               1 0001          1                                        12
                          12                                          12
            F
                          0,075
                           12
              R12 421,22                                                   answer

            He won't be able to buy the computer because                    conclusion
            R13 000 – R12 421,22 = R578,78                                                            (4)
            OR/OF
            He won't be able to buy the computer because
            R12 421,22 < R13 000
6.3.1       Loan amount = 85% × R250 000
                         = R212 500                                         answer                  (1)

            OR/OF                                                          OR/OF
            Loan amount = R250 000 – (15% × R250 000)
                        = R212 500                                          answer                  (1)
6.3.2                   0,13 
                                        5
                                                                                         0,13 
                                                                                                        5

            A  212 5001                                                 A  212 5001     
                           12                                                             12 
            A  224 262,53                                                 answer

            P
                             
                x 1  1  i)  n
                       i
                                 0,13  67  
                            x 1  1      ) 
                                       12                               substitution into
            224 262,53 
                                      0,13                                   correct formula
                                       12                                   – 67
                 x  R4 724,96                                             answer                   (5)
                                                                                                     [14]

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Mathematics P1/Wiskunde V1                            15                                  DBE/November 2022
                                    NSC/NSS – Marking Guidelines/Nasienriglyne

QUESTION 7/VRAAG 7

 7.1        f x   x 2  x
                             f x  h   f x 
            f / x   lim
                       h 0          h
                            ( x  h)  ( x  h )  ( x 2  x )
                                     2
            f x   lim
               /                                                                 substitution into
                       h 0                  h                                    the formula
                             x  2 xh  h  x  h  x 2  x
                               2            2
                                                                                  x 2  2 xh  h2  x  h
            f / x   lim
                       h 0                   h
                            2 xh  h  h
                                       2
                    = lim
                       h 0
                                                                                  2 xh  h 2  h
                                   h
                            h(2 x  h  1)
                     lim                                                        common factor
                      h 0         h
             f x   2 x  1
                 /
                                                                                 answer                   (5)
            OR/OF                                                                OR/OF
            f x   x 2  x
            f x  h  ( x  h) 2  ( x  h)  x 2  2 xh  h 2  x  h          x 2  2 xh  h2  x  h
            f x  h  f x   x 2  2 xh  h 2  x  h  x 2  x
                                2 xh  h 2  h                                   2 xh  h 2  h

                            f x  h   f x 
             f / x   lim
                      h 0          h
                           2 xh  h 2  h                                        substitution into
                  = lim                                                           the formula
                      h 0        h
                           h(2 x  h  1)
                   lim                                                          common factor
                     h 0         h
             f x   2 x  1
                /
                                                                                 answer               (5)
 7.2         f ( x)  2 x  3x  8 x
                        5      4
                                                                                  10x  4

             f / x   10 x 4  12 x 3  8                                        12x 3
                                                                                 8                    (3)
 7.3        g ( x)  ax 3  3x 2  bx  c                                         g ( x)  3ax  6 x  b
                                                                                      /        2

            g / ( x)  3ax 2  6 x  b                                           
            g // ( x )  6ax  6                                                 g // (1)  6a(1)  6  0
            g // (1)  6a(1)  6  0                                           a 1
                 a  1
            For concave up g // ( x)  0
            6x  6  0                                                           x>–1                       (4)
            x>–1

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Mathematics P1/Wiskunde V1                           16                                  DBE/November 2022
                                   NSC/NSS – Marking Guidelines/Nasienriglyne

            OR/OF
            Min gradient at (– 1 ; – 7) implies:
                                       at x = – 1 - point of inflection
                                       and g will be positive cubic
                                       hence a > 0
            Since g is concave up
                               x  1

            OR/OF

                       .   (– 1 ; – 7 )
                                                      .
            Since g is concave up                  (– 1 ; y)
            x  1                             Since g is concave up
                                                x  1

                                               1
                                Answer only:
                                               4

            OR/OF
            Min gradient at (– 1 ; – 7) implies:
                                       at x = – 1 - point of inflection
                                       and g will be positive cubic
                                       hence a > 0
            Since g is concave up
                               x  1

            OR/OF

                       .   (– 1 ; – 7 )
                                                      .
            Since g is concave up                  (– 1 ; y)
            x  1                             Since g is concave up
                                                x  1

                                               1
                                Answer only:
                                               4

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Mathematics P1/Wiskunde V1                           17                                  DBE/November 2022
                                   NSC/NSS – Marking Guidelines/Nasienriglyne

            OR/OF                                                               OR/OF
            Min gradient at (– 1 ; – 7) implies:
                                       at x = – 1 - point of inflection          point of inflection
                                       and g will be positive cubic
                                       hence a > 0                               a > 0
            Since g is concave up
                               x  1
                                                                                 x  1                (4)
            OR/OF
                                                                                OR/OF

                       .   (– 1 ; – 7 )
                                                                                pos graph
                                                      .
                                                   (– 1 ; y)                    point of inflection
            Since g is concave up
            x  1                             Since g is concave up
                                                x  1
                                                                                 x  1                (4)
                                               1
                                Answer only:
                                               4

                                                                                                         [12]

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Mathematics P1/Wiskunde V1                           18                                  DBE/November 2022
                                   NSC/NSS – Marking Guidelines/Nasienriglyne

QUESTION 8/VRAAG 8

 8.1         f / x   mx 2  nx  k
                             1                                                           1 
             f / x   m x  x  1                                  substitution of   ; 0 
                             3                                                           3 
                                                                          and (1 ; 0)
                        1
            1  m 0  0  1                                          substitution of (0 ; 1)
                        3
                1
            1  m
                3
            m  3                                                      m  3
                                1
             f / x   3 x  x  1
                                3
                                     1
             f / x   3 x 2  x  
                                  2                                                              1
                                                                         f / x   3 x 2  x  
                                                                                              2
                                 3   3
                                                                                             3   3
             f x   3x  2 x  1
               /            2

            n  2                                                      n  2
            k  1                                                      k 1                        (6)

            OR/OF                                                       OR/OF
            k 1                                                        k 1
                                      1    1
            0  m  n  1 and           m  n 1  0
                                      9    3
            m  n  1          (1)                                      m  n  1
            m  3n  9         (2)                                      m  3n  9

               (1) – (2)
            4n  8                                                       4n  8
            n  2                                                      n  2
            m  2  1
             m  3                                                     m  3                    (6)
 8.2.1       f x    x 3  x 2  x  2
               1  49
            f       1 ,81                                           x-coordinates of the TP
               3  27
                1 49 
            T.P  ;                                                         1 49 
                3 27                                                   T.P  ; 
                                                                              3 27 
             f 1  3
            T.P1 ; 3                                                   T.P1 ; 3                (3)

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Mathematics P1/Wiskunde V1                             19                                  DBE/November 2022
                                     NSC/NSS – Marking Guidelines/Nasienriglyne

 8.2.2       f x    x 3  x 2  x  2
             x3  x 2  x  2  0
                                    
             x  2  x 2  x  1  0
            x  2 or no solution                                          x2

                                                                          one x-intercept
                                         (1 ; 3)
                                     2
                             1                                           two turning points
                              ;1,81
                             3      
                                                   2                      y-intercept

                                                                           shape: neg cubic
                                                                                                       (5)
                     1
 8.3.1                1
            a       3
                      2
              1
                                                                          answer                     (1)
              3
            OR/OF                                                         OR/OF
            f / x   3x 2  2 x  1
             f / / x    6x  2
            f / /  a    6a  2  0
                              6a  2
                                    1
                                a                                         answer                     (1)
                                    3
                   4                                                          4
 8.3.2      b  units                                                     
                   3                                                          3
                                                                                  4
                                                                           b                        (2)
                                                                                  3
                                                                                                      [17]

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Mathematics P1/Wiskunde V1                                20                                        DBE/November 2022
                                        NSC/NSS – Marking Guidelines/Nasienriglyne

QUESTION9/VRAAG 9
9.1    Any point on f : x ; x 2                                                        
                                                                                        x ; x2     
            distance  ( x  10) 2  ( x 2  2) 2                                       substitution

                           x 2  20 x  100  x 4  4 x 2  4                          simplification

                       x 4  3x 2  20 x  104                                         answer
            For min distance
             d 4
            dx
                x  3x 2  20 x  104  0

            4 x3  6 x  20  0                                                         4 x3  6 x  20
            ( x  2)(4 x 2  8x  10)  0                                               derivative = 0
                      82  4(4)(10)  96  no roots
            x = 2                                                                     x = 2

            d  24  3(2) 2  20(2)  104  2 17  8,25                                answer (A)                  (8)

          ( x ; x2 ) A

                                                                     B(10 ; 2)

 9.2                     y2  y1 x 2  2
             mAB                                                                mAB
                         x2  x1 x  10
                               x  10                                                           x  10
              mtan g                                                           mtan g  
                               x2  2                                                           x2  2
              f / ( x)  2 x                                                      f / ( x)  2 x
                           x  10
              2x                                                               equating
                           x2  2
             2 x3  4 x  x  10
             2 x3  3x  10  0                                                   standard form
             x2                                                                 x = 2
             y  (2) 2  4
                 AB  (2  10) 2  (4  2) 2                                    substitute into distance
                 2 17  8, 25                                                   answer (A)                 (8)
                                                                                                              [8]

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Mathematics P1/Wiskunde V1                         21                                   DBE/November 2022
                                 NSC/NSS – Marking Guidelines/Nasienriglyne

QUESTION 10/VRAAG 10

                          A                                        C
                                            0,15           0,05
                              0,05
                                              x
                                     0,1             0,2

                                             0,183
                      y                      33            B

 10.1.1(a)    y = 1 – 0,893 = 0,107 (0,11)                               y = 1 – 0,893
                                                                                                   (1)
 10.1.1(b)    x = 0,893 – 0,733                                          x = 0,893 – 0,733
                = 0,16                                                                             (1)
 10.1.2       P(at least 2 events) = 0,1 + 0,15 + 0,16 + 0,2             values
                                = 0,61                                   answer
                                           Answer only: Full Marks
                                                                                                   (2)
 10.1.3       P(B) = 0,643                                               P(B) = 0,643
              P(C) = 0,56                                                P(C) = 0,56
              P(B and C) = 0,36                                          P(B and C) = 0,36
              P(B) × P(C) = 0,643 × 0,56 = 0,36                          P(B) × P(C) = 0,36
               P(B and C) = P(B) × P(C)                                 independent because
               B and C are independent                                       P(B and C) = P(B) × P(C)
                                                                                                   (5)
 10.2.1       7  6  5  4  840                                        4 7
                                                                         7  6  5  4  840
                                                                                                   (3)
 10.2.2       start with 5, 7, 9 or start with 6 or start with 8         3  5  1 3  45
              3  5 1 3  1 5 1 2  1 5 1 2                1 5  1 2  10
               45  10  10                                             1 5  1 2  10
               65                                                      65
                     65    13                                            answer
              P                0,08
                    840 168                                                                        (5)

              OR/OF                                                     OR/OF
              ends in 4 or ends in 6 or ends in 8                        5  5  1 1  25
              5  5 11  4  5 11  4  5 11                 4  5  1 1  20
               25  20  20                                             4  5  1 1  20
               65                                                      65
                    65    13                                             answer
              P               0,08
                   840 168                                                                          (5)
                                                                                                  [17]

                                                                                  TOTAL/TOTAAL: 150

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