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    Question

    The average of 6 values is 40. If two more values with an

    average of 'x' are added, the overall average increases by 20%. Find the value of 'x'.
    A 72 Correct Answer Incorrect Answer
    B 50 Correct Answer Incorrect Answer
    C 25 Correct Answer Incorrect Answer
    D 65 Correct Answer Incorrect Answer

    Solution

    ATQ,

    Sum of 6 values = 6 Ă— 40 = 240

    New average of all the numbers = 40 Ă— 1.2 = 48

    So, sum of 8 numbers = 48 Ă— 8 = 384

    So, average of two new numbers = (384 - 240) Ă· 2 = 72

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