7th Grade · Statistics & Probability
Probability
7.SP.C.5
Definition
A number between 0 and 1 that measures how likely an event is to occur. P = favorable outcomes ÷ total equally likely outcomes.
Examples
- P(rolling a 4 on a die) = 1/6 ≈ 0.167.
- P = 0 means impossible; P = 1 means certain.
Key rule
Probability is always between 0 and 1.
Memory hook
How likely, on a scale from impossible to certain.