An urn contains n > 0 white balls and m > 0 black balls. Consider the

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An urn contains n > 0 white balls and m > 0 black balls. Consider the experiment where two balls are drawn without replacement. What is the probability that the balls are of the same color? What is the probability of this event, if the balls are drawn with replacement? Which of these numbers is larger? (Explain your answer.)

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