SOLUTION: a shipment of 9 printers contains 4 that are defective. Find the probability that a sample of side 2, draw from 9, will not contain a defective printer

Algebra ->  Probability-and-statistics -> SOLUTION: a shipment of 9 printers contains 4 that are defective. Find the probability that a sample of side 2, draw from 9, will not contain a defective printer      Log On


   

Question 1006009: a shipment of 9 printers contains 4 that are defective. Find the probability that a sample of side 2, draw from 9, will not contain a defective printer
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
9C2 = 36 possible samples of size 2 (disregarding order).

Of these, 5C2 = 10 do not contain a defective printer since there are 5 working printers.

Probability = 10/36 = 5/18