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Discussion :: Average

  1. If the average of 20 numbers is zero, how many numbers may be greater than zero?
    2. A.
    19
    B.
    49
    C.
    17
    D.
    33

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    Answer : Option A

    Explanation :


    Average of 20 numbers = 0.
    Sum of 20 numbers = (0 x 20) = 0.
    So, it is quite possible that 19 of these numbers may be positive and if their sum is "X" then 20th number will be (-X).

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