Mathematics, 01.02.2021 22:40 monica1670
Twenty percent of all telephones of a certain type are submitted for service while under warranty. Of these, 70% can be repaired, whereas the other 30% must be replaced with new units. If a company purchases ten of these telephones, what is the probability that exactly four will end up being replaced under warranty
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Twenty percent of all telephones of a certain type are submitted for service while under warranty. O...
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