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An electronic assembly consists of two s...

An electronic assembly consists of two subsystems, say, `A` and `B`. From previous testing procedures, the following probabilities are assumed to be known:
P(A fails) =0.2
P(B fails alone) =0.15
P(Aand B fail) =0.15
Evaluate the following probabilities
i) `P`(`A` fails l `B` has failed)
ii) `P`(`A` fails alone)

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