Question: In the total US population, it is believed that only 12% of adults are lactose intolerant. If 200 US adults are selected at random, find

In the total US population, it is believed that only 12% of adults are lactose intolerant. If 200 US adults are selected at random, find the probability that fewer than 21 are lactose intolerant.

(use the normal distribution approximation to this binomial distribution problem)

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