6.62 Unknown to a quality-control inspector, 20% of a very large shipment of electric switches are defective.

Question:

The inspector has been told to reject the shipment if, in a sample of 15 switches, 2 or more are defective. What is the probability that the shipment will be rejected?

6.63 Repeat Exercise 6.29, but under the assumption that there are only 20 bearings in the supply bin, 2 of which are defective.

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