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11 In a large school one person in ve is left- handed. a A random sample of ten people is taken. Find the probability that

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11 In a large school one person in ve is left- handed. a A random sample of ten people is taken. Find the probability that i exactly four will be lefthanded ii more than half will be left-handed. b Find the most likely number of left- handed people in the sample of ten people. I: How large must a random sample be if the probability that it contains at least one left-handed person is greater than 0.95

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