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Probability Worksheets

Find exact theoretical probabilities from visible counters, dice, and fair spinners.

4–7New questions on every versionAnswer key included
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A preview

What a question looks like

Example questionA fair spinner has 12 equal sections: 3 red and 9 blue. What is the probability of landing on red?

Answer: 1/4

  1. There are 12 equally likely outcomes and 3 favorable outcomes.
  2. Probability = 3/12 = 1/4.
Teaching notes

Use this practice well

First count all equally likely outcomes, then count favorable outcomes. Simplify the resulting fraction and discuss whether the event is impossible, possible, or certain.

What this develops

Find exact theoretical probabilities from visible counters, dice, and fair spinners.

A mistake to watch for

Counting only favorable outcomes in the denominator can make a probability larger than one.

Ways to use it

  • Introduce favorable over total.
  • Compare fractions for likely events.
  • Use a fresh set to check the counting method.

Scope and limits

Models equally likely outcomes; real-world chance and experimental probability can differ.

Read our generation and answer-checking method.

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