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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)

B (0.2, 0.1)

C (0.2, 0.2)

D (0.1, 0.2)

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