Question: The ratio of the ages of I and J is 3:4. If the sum of their ages is 70 years, what is I\'s age?

Options:

1. 30
2. 35
3. 40
4. 45

Correct Answer: 35

Solution:

Let I\'s age be 3x and J\'s age be 4x. Then 3x + 4x = 70. Solving gives x = 10, hence I = 30.