Question 663125: From a large shipment of transistors from a supplier, 1% of the items are known to be defective. If a sample of 200 transistors are selected at random, what is the probability that 4 or more transistors will be defective?
The method I tried:
X-B(200,0.01), find P(X>=4)
n=200 np=200(0.01)=2<5
Therefore X-P(2)
P(X>=4)=1-P(X=3)
Then ???
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! From a large shipment of transistors from a supplier, 1% of the items are known to be defective. If a sample of 200 transistors are selected at random, what is the probability that 4 or more transistors will be defective?
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Binomial Problem with n = 200 ; p(defect) = 0.01
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P(x>=4) = 1 - P(0<= x <=3) = 1 - binomcdf(200,0.01,3) = 0.1420
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Cheers,
Stan H.
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