Formula
Probability = favorable outcomes / possible outcomes.
Die example
A die has 6 possible outcomes. Rolling an even number has 3 favorable outcomes: 2, 4 and 6. So 3/6 = 1/2 = 50%.
Probability measures how likely an event is.
Probability = favorable outcomes / possible outcomes.
A die has 6 possible outcomes. Rolling an even number has 3 favorable outcomes: 2, 4 and 6. So 3/6 = 1/2 = 50%.