A shipment of 9 printers contains 4 that are defective. Find the probability that a sample of size 4​, drawn from the​ 9, will not contain a defective printer .

the probability is ?

1 answer

there are 9C4 ways of selecting four printers

there are 5C4 ways of selecting four good printers

the probability is ... 5C4 / 9C4