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Verify that the following function is a probability mass function, and determine the requested probabilities. f (x) = (125/31) (1/5)* , x = {1,2,3} Round

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Verify that the following function is a probability mass function, and determine the requested probabilities. f (x) = (125/31) (1/5)* , x = {1,2,3} Round your answers to four decimal places (e.g. 0.9876). Is the function a probability mass function? (a) P(X 1 ) = (c) P (2 1) =

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