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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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