An urn contains five balls numbered 1, 2, 2, 8, and 8. If a person selects a set of
Chapter 9, Problem 18(choose chapter or problem)
An urn contains five balls numbered 1, 2, 2, 8, and 8. If a person selects a set of three balls at random, what is the expected value of the sum of the numbers on the balls?
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