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QA – Placement Quizzes | Age | Question 7
  • Last Updated : 15 May, 2016

A boy is older than girl by 7 years. If the ratio of ages of boy:girl is 9:7, what is the age of boy?
(A) 30 years
(B) 20 years
(C) 31.5 years
(D) 25.5 years


Answer: (C)

Explanation: say age of boy = b
age of girl = b-7
b:b-7 = 9:7
7b = 9b -63
2b = 63
b= 31.5 years

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