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in Introduction to Probability Theory by (49.1k points)
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A factory has two Machines-I and II. Machines-I produces 25% of items and Machine-II produces 75% of the items of the total output. Further 3% of the items produces by Machine-I are defective whereas 4% produced by Machine-II are defective. If an item is drawn at random what is the probability that it is defective?

1 Answer

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by (46.9k points)
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Best answer

Let A be the event that the items are produced by Machine-I and A be the event that the items are produced by Machine-II. 

Let B the event of drawing a defective item

Now

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