(a) A set of n identical components with reliabilities 0.90 are placed in parallel. What value of...

Question:

(a) A set of n identical components with reliabilities 0.90 are placed in parallel. What value of n is needed to ensure that the overall system reliability is at least 0.995?
(b) In general, how many identical components with reliabilities ri need to be placed is parallel to ensure an overall system reliability of at least r?