SOLUTION: In a shipment of 20 smartphones, 2 are defective. How many ways can a quality control inspector randomly test 5 smartphones, of which 2 are defective?
Algebra ->
Permutations
-> SOLUTION: In a shipment of 20 smartphones, 2 are defective. How many ways can a quality control inspector randomly test 5 smartphones, of which 2 are defective?
Log On
Question 1132853: In a shipment of 20 smartphones, 2 are defective. How many ways can a quality control inspector randomly test 5 smartphones, of which 2 are defective?
The quality control inspector can add 3 randomly selected smartphones from the rest of 20-2 = 18 smartphones.
He can do it by = = 816 ways.
It is the ANSWER to the problem's question.
