Question

    The average of n numbers is 56. If each of 45% 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 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. = 56 + ((45 x 18 - 55 x 12)/100) = 56 + 1.5 = 57.5

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