New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    The average of n numbers is 64. If each of 56% 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 68 Correct Answer Incorrect Answer
    B 62.3 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

    Average = 64 + ((56 x 15 - 44 x 10)/100) = 64 + 4 = 68

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