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    Question

    What is the average of first 31 multiples of

    3.1?
    A 78 Correct Answer Incorrect Answer
    B 49.6 Correct Answer Incorrect Answer
    C 40.6 Correct Answer Incorrect Answer
    D 59.5 Correct Answer Incorrect Answer

    Solution

    First term = 3.1 x 1 = 3.1 Last term = 3.1 x 31 = 96.1 Required average = (3.1 + 96.1)/2 = 49.6

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