A box contains 3 red and 9 blue balls suppose 5 balls are, Ask an Expert

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A box contains 3 red and 9 blue balls. Suppose 5 balls are drawn at random(without replacement) from the box. Let Y be the number of red balls drawn.

(a) Determine the probability mass function for Y.

(b) Compute P(Y less than or equal to 2).

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Statistics and Probability, Statistics

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