document.write( "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? \n" ); document.write( "
Algebra.Com's Answer #504194 by richard1234(7193)\"\" \"About 
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Select the two defective phones, and then select three out of the 18 good ones. The number of ways is 18C3. \n" ); document.write( "
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