In a family, the average age of a father and a mother is 35 years. The average age of the father, mother and their only son is 27 years. What is the age of the son?

A. 10 years

B. 10.5 years

C. 11 years

D. 12 years

Answer: Option C

Solution(By Examveda Team)

Sum of ages of father and mother
= (35 × 2) years
= 70 years
Sum of ages of father, mother and son
= (27 × 3) years
= 81 years
∴ Son's age = (81 - 70) years
= 11 years