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    Question

    The value of a and b so that the following is

    probability mass function X:                            0              1              2 P(X =x):                                3a           3b           4b with mean 1.1, is:
    A (0.1, 0.1) Correct Answer Incorrect Answer
    B (0.2, 0.1) Correct Answer Incorrect Answer
    C (0.2, 0.2) Correct Answer Incorrect Answer
    D (0.1, 0.2) Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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