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A machine shop has 80 drill presses and other machines in constant use. The probability that...

A machine shop has 80 drill presses and other machines in constant use. The probability that a machine will become inoperative during a given day is 0.004. During some days no machines are inoperative, but during some days, one, two, three or more are broken down. What is the probability that fewer than three machines will be inoperative during a particular day?

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