Question: Suppose we have two boxes; box A and box B. Suppose that box A contains 10 blue balls and 40 red balls. Suppose that box

Suppose we have two boxes; box A and box B. Suppose that box A contains 10 blue balls and 40 red balls. Suppose that box B contains 18 blue balls and 12 red balls. Choose one box at random (with equal probabilities), and then draw two balls (without replacement) from the chosen box.

A) Let Xdenote the number of red balls among selected balls. What is the mean ofX?

B)What is the variance ofX?

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