Question: The ratio of the number of students in two classes is 4:5. If there are 36 students in the first class, how many students are in the second class?

Options:

1. 45
2. 40
3. 50
4. 36

Correct Answer: 45

Solution:

Let the number of students in the first class be 4x and in the second class be 5x. Given 4x = 36, x = 9. Therefore, students in the second class = 5x = 5*9 = 45.