Suppose that 1% of all items in a supermarket are not priced properly. A customer buys ten

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Suppose that 1% of all items in a supermarket are not priced properly. A customer buys ten items. What is the probability that she will be delayed by the cashier because one or more of her items require a price check? Calculate both a binomial answer and a Poisson answer. Is the binomial model "exact" in this case? Explain.

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