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A system consists of four components in parallel with two components having reliability of 0.9 and two others having reliability of 0.8 at the end of one year. What is the system reliability at the end of one year?

A system consists of four components in parallel with two components having reliability of 0.9 and two others having reliability of 0.8 at the end of one year. What is the system reliability at the end of one year? Correct Answer 0.9996

System reliability for parallel components is given by R(s)=1- or, R(s)=1- = 0.9996.

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