Question 438063
 a machine has 7 identical components which fucntion independently. the probability that a component will fail is 0.200. the machine will stop working if more than three components fail. find the probability that the machine will be working.
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P(component fails) = 0.2
P(component does not fail) = 0.8
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P(7 components do not fail) = 0.8^7 = 0.2097
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Cheers,
Stan H.