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    Question

    If Arithmetic mean and coefficient of variation of x

    are 10 and 40 respectively, then the variance of y = 10 – 2x is:
    A 32 Correct Answer Incorrect Answer
    B 64 Correct Answer Incorrect Answer
    C 22 Correct Answer Incorrect Answer
    D 16 Correct Answer Incorrect Answer

    Solution

    The correct answer is B

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