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Discussion :: Average

  1. The average age of a group of 6 boys is 19. If the new average age after a boy joins the group is 21.28, find the age of new boy.

    2. A.
    Approx 23
    B.
    Approx 32
    C.
    Approx 35
    D.
    Approx 45

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    Answer : Option C

    Explanation :


    Use Formula:
    Age of new body= New average + Number of boys initially * increase in average
    = 21.28 + 6*2.28
    =21.28 + 13.68
    = 34.96

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