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Question: there are three machines a b and c in a...

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There are three machines A, B, and C in a factory. Their daily outputs are in the ratio of 2:3:1. Past experience shows that 2% 4% and 5% of the items produced by A, B, and C respectively are defective. if an item selected at random is found to be defective, find the probability that it was produced by A or B

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