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5.2. A system consisting of one original unit plus a spare can function for a random amount of time X. If the density of X is given (in units of
months) by
Cre/2
f()
what is the probability that the system functions for at least 5 months?
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5.2. A system consisting of one original unit plus a spare can function for a random amount of time X. If the density of X is given (in units of months) by Cre/2 f() what is the probability that the system functions for at least 5 months?

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