  # Opposite Probabilities

In this worksheet, students calculate the probability of events not happening. Key stage:  KS 3

Curriculum topic:   Probability

Curriculum subtopic:   Understand Probability Outcomes

Difficulty level:   #### Worksheet Overview

If the probability of something happening is x, then the probability of it not happening is 1 - x.

Example

If the probability that it will rain is 3/8, then the probability that it will not rain is 1 - 3/8 = 5/8

Example The probability of the spinner landing on yellow is 3/8.

The probability of the spinner not landing on yellow is 1 - 3/8 = 5/8

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