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An electronic assembly consists of two sub-systems 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(A` and `B` Fail `)=0.15`. Evaluate the following probabilities: (i)`P(A` fails`/B` has failed `)` (ii) `P(A` fails alone`)`

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