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7 years ago
Two percent of the parts produced by a machine are defective. Forty parts are selected. Define the random variable x to be the number of defective parts. a . What is the probability that exactly 3 parts will be defective? b. What is the probability that the number of defective parts will be more than 2 but fewer than 6? c. What is the probability that fewer than 4 parts will be defective? d. What is the expected number of defective parts? e. What is the variance for the number of defective parts?
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#1
7 years ago
a . .0374
b. .0455
c. .9918
d. .8
e. .784
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