Probability

Probability

• Definition: The chance that an event occurs, expressed as a proportion of the total outcomes.

• Formula:

  $$P(A)=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$$

• Range: $0\le P(A)\le 1$

Example:

If a die is rolled, the probability of rolling a 4 is: $P(4)=\frac{1}{6}$