Math
Basic probability.
Definition
The measure of how likely an event is to occur, expressed as a number from 0 (impossible) to 1 (certain). The probability of an event equals the number of favorable outcomes divided by the total number of equally likely outcomes.
Examples
Real-world.
- 1 The probability of rolling a 3 on a fair die is 1/6
- 2 The probability of drawing a red card from a standard deck is 26/52 = 1/2
Key Fact
P(event) = favorable outcomes / total outcomes; 0 ≤ P ≤ 1