math

Of the total output of a factory, 35% is produced by workshop A and 65% by workshop B.on the average 15 out of 1000 times produced by A are defective. If an item drawn at random from the whole output is defective, what is the probability that it is from A

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  1. Are all the ones from B perfect or are all the ones from B defective or something else?

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    posted by Damon

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