Engineering, 03.04.2021 17:00 sjkmxm4090

A large chain retailer purchases a certain kind of electronic device from a manu- facturer. The manufacturer indicates that the defective rate of the device is 3%.

(a) The inspector randomly picks 20 items from a shipment. What is the proba-

bility that there will be at least one defective item among these 20?

(b) Suppose that the retailer receives 10 shipments in a month and the inspector

randomly tests 20 devices per shipment. What is the probability that there

will be exactly 3 shipments each containing at least one defective device among

the 20 that are selected and tested from the shipment?

Answers: 3

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