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Geometry 8 Online
OpenStudy (anonymous):

a machine needs 2 of its gears replaced. you find 2 gears, one manufactured 5 years age and the other manufactured 10 years ago. the chance of failure is 5% after 5 years and increases to 8% after 10 years. if the gears arnt linked to eachother what are the chances that both of them fail?

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