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.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
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.