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A factory has two machines A and B. Mach...

A factory has two machines A and B. Machine A produces `40%` of items of the output and Machine B produces `60%` of the items. Further `4%` of items produced by Machine A are defective and `5%` produced by Machine B are defective. An item is drawn at random. If the drawn item is defective, find the probability that it was produced by Machine B.

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The correct Answer is:
`(15)/(23)`
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