Ononot — A project consists of two stages. The probability of passing

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Conditional Probabilityhard

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A project consists of two stages. The probability of passing Stage 1 is $0.8$ . If Stage 1 is passed, the probability of passing Stage 2 is $0.7$ . If Stage 1 is failed, the probability of passing Stage 2 is $0.3$ . What is the probability that Stage 1 was passed, given that Stage 2 was passed?