7th Grade · Statistics & Probability
Theoretical Probability
7.SP.C.6
Definition
Calculated using the ratio of favorable outcomes to total equally likely outcomes. Predicts what should happen based on mathematical reasoning, without running an experiment.
Examples
- A bag with 4 blue and 6 red marbles: P(blue) = 4/10 = 40%.
- With more trials, experimental results approach the theoretical probability.
Key rule
Theoretical probability assumes outcomes are equally likely.
Memory hook
What should happen, based on the math alone.