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2% of printers produced by a manufacturer leave with operational problems. A dealer wishes to purchase...

2% of printers produced by a manufacturer leave with operational problems. A dealer wishes to purchase a batch of printers from this manufacturer on the condition that a random selection of 10 more printers than two does not have a malfunction.

a.Find the probability that the dealer will buy the batch of printers.
b. If Y = 10X + 150, represents the cost of repairing a printer, calculate the expected value of repair costs and their standard deviation.

Math   Statistics-And-Probability   
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