# 5.4.2. Theoretical Probability

A class has 63 students, where the number of girls is less than that of boys by 13. If a student is chosen randomly, find the probability of the student being a boy?

- A
- B
- C
- D

### Example

A class has 63 students, where the number of girls is less than that of boys by 13. If a student is chosen randomly, find the probability of the student being a boy?

### Solution

Step 1: Determine the number of boys in the class.

Write an equation to represent the number of girls and boys in the class. Let

So, there are 38 boys in the class.

Step 2: Determine the probability that a randomly selected student is a boy.

Divide the number of boys in the class by the total number of students in the class.