Fair Rules OR Not?
probability · fairness and compound probability with spinner and coin
Decide whether game rules are fair by comparing the probabilities for two players.
Fair Rules OR Not? is a Grade 7 probability investigation built around a simple question: do two players actually have an equal chance to move? Students compare compound outcomes from a numbered spinner and a coin, calculate the probabilities for each player, and decide whether the rules are fair. The setup pushes students beyond intuition because a 50/50 coin does not automatically make the whole game equitable.
Use it with partners or as a whole-class discussion when you want students reasoning about compound probability and fairness. A useful follow-up asks them to change the spinner so both players have an equal chance, turning probability into a design problem. Create a free Find a Math Game account to generate lesson support for Fair Rules OR Not? The free account includes 3 lifetime lesson generations with no credit card required.
- Grades:
- 7
- Players:
- 2 players
- Materials:
- printable
- Classroom use:
- whole class, partner work
Standards alignment
Official Rules
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