## Precalculus (6th Edition) Blitzer

We know that the empirical probability applies to situations in which we observe how frequently an event occurs. And the Empirical probability of event $E$, denoted by $P\left( E \right)$, is calculated as given below; $P\left( E \right)=\frac{\text{observed}\ \text{number}\ \text{of}\ \text{times}\ E\ \text{occurs}}{\text{total}\ \text{number}\ \text{of}\ \text{observed}\ \text{occurrences}}$