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It has been found that 80% of all printers used on home computers operate correctly at the time of installation. The rest require some adjustment. A particular dealer sells 10 units during a given month.

(a) Find the probability that at least nine of the printers operate correctly upon installation.

(b) Consider five months in which 10 units are sold per month. What is the probability that at least nine units operate correctly in each of the 5 months?

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Statistics and Probability, Statistics

Category:- Statistics and Probability
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