SOLUTION: a shipment of 9 printers contains 4 that are defective. find the probability that a sample size of 2, drawn from the 9, will not contain a defective printer ?
Please answer fas
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Question 825062: a shipment of 9 printers contains 4 that are defective. find the probability that a sample size of 2, drawn from the 9, will not contain a defective printer ?
Please answer fast !
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
The probability that any one of the 9 printers will not be defective is .
If you pick one that is not defective, you will have 8 printers to choose a second printer from,
and 4 of those are defective, so your chance of picking a second good one is
.
Multiplying, you find that you would pick 2 good printers
of the time.
Your probability of picking 2 good printers from that lot is
=0.278 (rounded) or 27.8%.
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