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    Question

      X and Y are independent normal variables with mean

    50 and 80 respectively and standard deviation as 4 and 3 respectively. What is the distribution of X+Y?
    A N(130, 7) Correct Answer Incorrect Answer
    B N(130, 3) Correct Answer Incorrect Answer
    C N(130, 5) Correct Answer Incorrect Answer
    D N(130, 4) Correct Answer Incorrect Answer

    Solution

    The correct answer is C

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