An urn contains 1 red ball, 1 yellow ball and 1 blue ball. A ball is randomly selected. a) Find the probability distribution for the number of yellow balls. b) Find the expected value and variance for the number of yellow balls. Now, consider three urns. Urn 1 contains 1 red ball, 1 yellow ball and1 blue ball. Urn 2 contains 1 red ball, 2 yellow balls and no blue ball. 11. 1

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