Question: A system has reliability function R(t) = e -(a+c)t + e -(b+c)t + e -(a+b+c)t where a = 0.12 b = 0.07 c = 0.15

A system has reliability function

R(t) = e-(a+c)t+ e-(b+c)t+ e-(a+b+c)t

where

a = 0.12 b = 0.07 c = 0.15

Determine the mean time to failure (give answer correct to 3 decimal places).

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