Question

Maine Corporation buys motors for electric fans from another company that guarantees that at most 5% of its motors are defective and that it will replace all defective motors at no cost to Maine Corporation. The motors are received in large shipments. The quality control department at Maine Corporation randomly selects 20 motors from each shipment and inspects them for being good or defective. If this sample contains more than 2 defective motors, the entire shipment is rejected.
a. Using the appropriate probabilities table from Appendix C, find the probability that a given shipment of motors received by Maine Corporation will be accepted. Assume that 5% of all motors received are defective.
b. Using the appropriate probabilities table from Appendix C, find the probability that a given shipment of motors received by Maine Corporation will be rejected.


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  • CreatedAugust 25, 2015
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