Quantitative Aptitude Ques 1311

Question: 3 yr ago, the average age of a family of 5 members was 17 yr. A baby having been born, the average age of the family is same today. The present age of the baby is

Options:

A) $ 1yr $

B) $ 1\frac{1}{2}yr $

C) $ 2yr $

D) $ 3yr $

Show Answer

Answer:

Correct Answer: C

Solution:

  • Present age of family of 5 member $ =17\times 5+5\times 3=85+15=100yr $ Total age of family of 6 members $ =6\times 17=102yr $

$ \therefore $ Present age of baby $ =102-100=2yr $

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