What was the Average Age of Family? If

The average age of 5 members of a family is 22 years. If youngest member is 5 year old, what was the average age of family at the time of the birth of youngest member?

  1. 21 years
  2. 22.5 years
  3. 21.25 years
  4. None of these
Desire Adnan Default Asked on 4th August 2015 in Maths.
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  • 1 Answer(s)

    Answer: (3) 21.25 years
    Explanation:-
    The average age of 5 members of a family = 22 years
    Then, total age of 5 members of a family = 22 x 5
    = 110 years

    The youngest member of family = 5 years
    The total age of family at the time of the birth of youngest member = 110 – 5 x 5
    =110 – 25
    = 85 years

    Then, the average age of four family members = 85/4
    = 21.25 years.
    Hence, the answer is (3) 21.25 years.

    Anurag Mishra Professor Answered on 4th August 2015.
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