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    Question

    The average of the first 7 non-zero multiples of 18

    is:
    A 42 Correct Answer Incorrect Answer
    B 72 Correct Answer Incorrect Answer
    C 46 Correct Answer Incorrect Answer
    D 27 Correct Answer Incorrect Answer

    Solution

    The sum of 7 multiple of 18 = (18+36+........126) = 18(1+2+......7) = 18(7├Ч8)/2 =18├Ч28 Average = (18├Ч28)/7 =18├Ч4=72

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