# 11.4.1. Calculating Probability

5 Russian, 6 Italian, and 29 French tourists went on a package tour. If one of them is randomly chosen to conduct a survey on the tour, determine the probability of selecting a French or Italian tourist.

- A0.875
- B0.125
- C0.15
- D0.725

### Example

5 Russian, 6 Italian, and 29 French tourists went on a package tour. If one of them is randomly chosen to conduct a survey on the tour, determine the probability of selecting a French or Italian tourist.

### Solution

The probability of event

The probability of event

The notation

Thus, the probability of selecting a French or Italian tourist is 0.875.