There are N identical components having failure rate Ie with k components in series and n – k…

There are N identical components having failure rate Ie with
k components in series and n – k standby units. Derive the reliability function
and find the MTTF.

A load is exponential with a mean of 2S. The strength is
exponential. Determine the minimum value of the mean strength in order to
achieve a reliability of 0.9S.