Question: Problem #1: An urn contains balls numbered I through 20. 21 balls are selected. one at at time, and with replacement. What is the probability

Problem #1: An urn contains balls numbered I through 20. 21

Problem #1: An urn contains balls numbered I through 20. 21 balls are selected. one at at time, and with replacement. What is the probability that each ball is selected at least once? [ ' Enter your answer symbolically, Problem " 2 as In these cxamplu

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