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    Question

    The average of n numbers is 62. If each of 55% of

    the numbers is increased by 18 and each of the remaining numbers is decreased by 12, then the new average of the numbers will be
    A 68 Correct Answer Incorrect Answer
    B 66.5 Correct Answer Incorrect Answer
    C 67.5 Correct Answer Incorrect Answer
    D 63.4 Correct Answer Incorrect Answer
    E Cannot be determined Correct Answer Incorrect Answer

    Solution

    Avg. = 62 + ((55 x 18 - 45 x 12)/100) = 62 + 4.5 = 66.5

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