What will be the Average Age of 4th Friends? If

The average age of 3 friends is 23. Even if the age of 4th friend is added, the average remains 23. what is the age of the 4th friend?

  1. 21 years
  2. 23 years
  3. 32 years
  4. None of these
vijay Professor Asked on 6th August 2015 in Maths.
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  • 1 Answer(s)

    Answer: (2) 23 years

    Explanation:-
    Let the age of new friend = X years
    The average age of 3 friends = 23.
    Then, the sum of the age of 3 friends = 23 x 3
    = 69 years.

    Then, the total age of 4 friends = (69 + X) years
    According to the question,
    69 + X = 23 x 4
    69 + X = 92
    X = 92 – 69
    X = 23

    Then, the age of fourth friend is 23 years.
    Hence, the answer is (2) 23 years.

    Anurag Mishra Professor Answered on 7th August 2015.
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