A survey finds that customers are charged incorrectly for 4 out of every 30 items, on average. Suppose a customer purchases 15 items. Find the following probability. A customer is not charged incorrectly for any item. The probability is (Round to four decimal places as needed.)
Added by Margaret H.
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According to the survey, this happens 4 out of 30 times, so the probability is 4/30 = 0.1333. The probability of a customer not being charged incorrectly for a single item is therefore 1 - 0.1333 = 0.8667. Show more…
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