Question

The average age of a father and his two sons is 25 years. Father's age is 40 years and elder son is 3 years older than the younger son. Then what is the age of the younger son?

• A. 18 years
• B. 20 years
• C. 23 years
• D. 16 years

Answer 1

Answer:

D. 16 years

The average age of 3 persons = 25 years Total age = 25 × 3 = 75 years We know that father's sage = 40 years. Then sum of both son's age = 75 - 40 = 35 years. Let the age of the younger son be x years. Then, the age of the elder son = (x + 3) years. x + (x + 3) = 35 years x + x + 3 = 35 years 2x = (35 - 3) years 2x = 32 years x = 16 years age of the younger son = 16 years.