Business, 25.02.2020 21:03 alligatorsocks

A stock brokerage has four computers that are used for making trades on the NY Stock Exchange. The probability that a computers fails on any single day is .005. Failures occur independently. Any failed computers are repaired after each exchange closes, so each day can be considered an independent trial. A) What is the probability that all four computers fail on one day?B) What is the probability that at least one computer fails on a day?C) What is the mean number of days until a specific computer fails?

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