A large chain retailer purchases a certain kind of clectronic device from a manu- facturer. The manufacturer indicates that the defective rate of the device if 3%. (a) The inspector randomly picks 20...

Extracted text: A large chain retailer purchases a certain kind of clectronic device from a manu- facturer. The manufacturer indicates that the defective rate of the device if 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 cach cotaining at least one defective device among the 20 that are selected and tested from the shipment?