# Complementary Events

> This section is complementary events. The complement of event A is every outcome in the sample space S that is not in A. Write it A' (or A^c, or not A). Complementary events are mutually exclusive…

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## Full notes

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## More in Counting principle and probability

- [Mutually Exclusive Events](https://www.hlayiso.com/grade-12/mathematics/notes/counting-principle-and-probability/mutually-exclusive-events) — Previous section
- [Events Which Are Not Mutually Exclusive](https://www.hlayiso.com/grade-12/mathematics/notes/counting-principle-and-probability/events-which-are-not-mutually-exclusive) — Next section
- [All Counting principle and probability sections](https://www.hlayiso.com/grade-12/mathematics/notes/counting-principle-and-probability)

## Frequently asked questions

### What will I learn in "Complementary Events"?

This section covers Complementary Events as part of Counting principle and probability in Grade 12 Mathematics. You'll find clear explanations, worked examples, and key definitions aligned to the CAPS curriculum.

### Is this section aligned with the CAPS curriculum?

Yes. All notes on Hlayiso, including "Complementary Events", are written against the official CAPS curriculum and ATP for Grade 12 Mathematics.

### What should I study after "Complementary Events"?

Continue with the next section in Counting principle and probability, or test your understanding with the interactive quiz linked to this section.

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