SOLUTION: Two percent of the parts produced by a machine are defective. Twenty parts are selected at random. What is the probability that the number of defective parts will be more than

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Question 245523: Two percent of the parts produced by a machine are defective. Twenty parts are selected at random.
What is the probability that the number of defective parts will be more than 2 but fewer than 6?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Two percent of the parts produced by a machine are defective.
Twenty parts are selected at random.
What is the probability that the number of defective parts will be more than 2 but fewer than 6?
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It's binomial with n=20 ; p = 0.02 ; 2< x < 6
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binomcdf(20,0.02,5)-binomcdf(20,0.02,2) = 0.007
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Cheers,
Stan H.