SOLUTION: In a shipment of 20 smart phones, 2 are defective. How many ways can a quality control inspector randomly test 5 smart phones, of which 2 are defective?
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Question 836447: In a shipment of 20 smart phones, 2 are defective. How many ways can a quality control inspector randomly test 5 smart phones, of which 2 are defective? Answer by richard1234(7193) (Show Source):
You can put this solution on YOUR website! Select the two defective phones, and then select three out of the 18 good ones. The number of ways is 18C3.
