5.57 Errors in a billing process often lead to customer dissatisfaction and ultimately hurt bottom-line profits. An article in Quality Progress (L. Tatikonda, “A Less Costly Billing Process,” Quality Progress, January 2008, pp. 30–38) discussed a company where 40% of the bills prepared contained errors. If 10 bills are processed, what is the probability that a. 0 bills will contain errors? b. exactly 1 bill will contain an error? c. 2 or more bills will contain errors? d. What are the mean and the standard deviation of the probability distribution?
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