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**The numbers represent the probability that each component works.**

a) What's the probability that the entire system works?

b) Given that the system works, what's the probability that the component A is not working?

a) What's the probability that the entire system works?

b) Given that the system works, what's the probability that the component A is not working?

a) P=.75112, easy

b) Don't know what to do here....