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Home Verbal Reasoning Problems on Ages See What Others Are Saying!
  • Question
  • Three years ago, the average age of a family of five members was 17 years. A baby having been born, the average age of the family is the same as what was three years ago. The present age of the baby is:


  • Options
  • A. 6 month
  • B. 9 month
  • C. 1 years
  • D. 2 years

  • Correct Answer
  • 2 years 

    Explanation

    Let us assume the present age of baby Y year.
    According to question,
    Three years ago, the average age of a family of 5 members was 17 years.
    The present Total age of the family of 5 member = 5 x 17 + 5 x 3 =100 ..........(1)
    Again according to question,
    The average age of the family is the same as what was three years ago.
    The present average age of family of 6 member= 17
    Total present age of family of 6 member / 6 = 17
    (Total present age of family of 5 member + present age of baby)/6 = 17
    100 + Y = 17 x 6
    Y = 17 x 6 - 100 = 102 - 100 = 2 years


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