New Enroll in RBI Grade B New Batch - Starts on May 21

    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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