Mystery Bags
probability · experimental and theoretical probability with replacement
Use mystery bags to compare experimental results with theoretical probabilities for red and blue tiles.
Mystery Bags is a Grade 7 probability investigation that compares experimental results with theoretical probabilities. Students repeatedly draw and replace red or blue tiles from three hidden bags, tally the outcomes, and decide which bag would be best for winning a color-based prize. Only afterward are the actual bag contents revealed and the theoretical probabilities calculated.
Use it for whole-class or independent probability work when students are learning the difference between what happened in an experiment and what should happen in the long run. The three contrasting bags make the comparison especially clear. Create a free Find a Math Game account to generate teacher-ready lesson support for Mystery Bags. No credit card, with 3 lifetime lesson generations.
- Grades:
- 7
- Players:
- 1 player
- Materials:
- counters, paper, printable
- Classroom use:
- whole class, independent
Standards alignment
Official Rules
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