Determine whether you can use a normal distribution to approximate the binomial distribution. If you can, use the normal distribution to approximat the indicated probabilities and sketch their graphs. If you cannot, explain why and use a binomial distribution to find the indicated probabilities. Identify any unusual events. Explain. In a survey of U.S. adults, 19% said that they have participated in a clinic trial. You randomly select 220 U.S. adults. Find the probability that the number who have participated in a clinical trial is (a) no fewer than 34, (b) more than 44, and (c) between 39 and 49 inclusive.

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