The sum of ages of P and Q is 15 years more than the sum of ages of Q and R. How many years younger is R as compared to P?

Correct option is A

Given:
The sum of ages of P and Q is 15 years more than the sum of the ages of Q and R.
Solution:
According to the question:
=> P + Q = Q + R + 15
=> P = R + 15
=> R = P - 15
Hence, R is "15" years younger than P.