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Question: 5 in a class of 60 students 13 could not...

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5. In a class of 60 students, 13 could not roll their tongue, 17 had attached earlobes, and 10 could roll their tongues and had attached earlobes. A student is randomly selected from this class. Find the probability that the selected student: a can roll his or her tongue. b could not roll his or her tongue and had attached earlobes. c could either roll his or her tongue or had attached earlobes but not both.

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