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Discussion :: Average

  1. The average age of 30 boys in a class is 15 years. If we include the age of two teachers the average age increases by 1. Find the sum of ages of the two teachers.
    2. A.
    55 years
    B.
    58 years
    C.
    62 years
    D.
    64 years

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    Answer : Option C

    Explanation :

    Total age of 30 boys would be = 30∗15 = 450 years

    Total age of 30 boys and 2 teachers would be = 32∗16= 512 years

    ∴ Sum of ages of two teachers would be = 512 - 450 = 62 years

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