In a family, the average age of a father and a mother is 35 years. The average age of the father, mother and… · ABC26GN1545
Subject: General Aptitude · Chapter: Average · Exam: S.S.C. 2010
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
Answer (as printed): C
Explanation
Sum of ages of father and mother $=(35 \times 2)$ years $$\text { = } 70 \text { years. }$$ Sum of ages of father, mother and son $=(27 \times 3)$ years $$\text { = } 81 \text { years. }$$ ∴ Son's age $=(81-70)$ years $=11$ years.
Explanation as extracted from the printed page; notation may be imperfect.