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OpenStudy (anonymous):
Approximately 12% of the population is left handed. A random sample of 200 people are selected. (a) What is the expected number of left handed people selected? (b) What is the standard deviation of the number of left handed people selected. (c) What is the probability that less than 20 left handed people are selected? (d) What is the probability that more than 20 but less than 26 left handed people are selected? @Calculus1
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