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In a shipment of 20 engines, history shows that the probability of any one engine proving unsatisfactory is 0.1 What is the probability that the

In a shipment of 20 engines, history shows that the probability of any one engine proving unsatisfactory is 0.1 What is the probability that the second engine is defective given the first engine is not defective? From the result, draw the conclusion if the first and second engines are dependent or independent

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