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    Question

    The average of three numbers is 60. When three more numbers

    are included, the average increases by 6. Find the average of the numbers included.
    A 70 Correct Answer Incorrect Answer
    B 72 Correct Answer Incorrect Answer
    C 74 Correct Answer Incorrect Answer
    D 76 Correct Answer Incorrect Answer

    Solution

    Sum of the 3 numbers = 60 Ă— 3 = 180
    New average = 60 + 6 = 66
    Sum of 6 numbers = 66 Ă— 6 = 396
    Sum of new 3 numbers = 396 - 180 = 216
    Required average = 216 Ă· 3 = 72

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