Question

    For the frequency distribution of X number of grammatical mistakes per line is as follows.

    X:            0              2              4

    P(x):      0.5          0.3          0.2

    The third factorial moment of X is:

    A 3.6 Correct Answer Incorrect Answer
    B 2.8 Correct Answer Incorrect Answer
    C 3.2 Correct Answer Incorrect Answer
    D 4.8 Correct Answer Incorrect Answer

    Solution

    The correct answer is D

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