Question 759385
A printing company's bookbinding machine has a probability of 0.75 for producing a perfect book. This machine used to bind three books together. 
1) Find the probability that all three books are perfect books?
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Binomial Prob. with n = 3 and P(perfect( = 0.75
P(x = 3) = 0.75^3 = 0.4219
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2) Find the probability that at least one of the books are perfect?
P(at least one perfect) = 1 - P(all are defective)
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= 1 - 0.25^3
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= 0.9844
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Cheers,
Stan H.
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