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    Question

    The average of five numbers is 62. When three more numbers

    are included, the average increases by 6. Find the average of the numbers included.
    A 78 Correct Answer Incorrect Answer
    B 80 Correct Answer Incorrect Answer
    C 82 Correct Answer Incorrect Answer
    D 84 Correct Answer Incorrect Answer

    Solution

    Sum of the 5 numbers = 62 × 5 = 310
    New average = 62 + 6 = 68
    Sum of 8 numbers = 68 × 8 = 544
    Sum of new 3 numbers = 544 - 310 = 234
    Required average = 234 ÷ 3 = 78

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