A system has two failure modes. One failure mode, d…

A system has two failure modes. One failure mode, due to external conditions, has constant failure rate of 0.07 failures per year. The second, attributed to wear out, ha • a Weibull distribution with a characteristic life of 10 yr and a shape parameter of 1.8. Determine the system reliability for a design life of 1 yr. Find by trial and error the median time to failure.
Notice that is required to solve by trial and error. So please do not solve it in any other way.

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