Students learn how mutually exclusive events are represented in a Venn diagram and that probabilities add up to one.

As learning progresses they use mutually exclusive events to calculate the probability of an event not happening.

**Differentiated Learning Objective**

- All students should be able to identify mutually exclusive events.
- Most students should be able to understand that the probabilities of all possible outcomes sum to 1.
- Some students should be able to calculate the probability of an event not happening.