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    Question

    The average of n numbers is 60. If each of 50% of

    the numbers is increased by 15 and each of the remaining numbers is decreased by 10, then the new average of the numbers will be
    A 66.5 Correct Answer Incorrect Answer
    B 62.5 Correct Answer Incorrect Answer
    C 57.5 Correct Answer Incorrect Answer
    D 63.5 Correct Answer Incorrect Answer
    E Cannot be determined Correct Answer Incorrect Answer

    Solution

    Avg. = 60 + ((50 x 15 - 50 x 10)/100) = 60 + 2.5 = 62.5

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