I need some help figuring out how to go about this problem. A retailer purchases 90 of a new brand o

I need some help figuring out how to go about this problem.

A retailer purchases 90 of a new brand of DVD player, of which 8 are defective. The purchase agreement says that if he tests 5 chosen at random and finds 1 or more defective, he receives all the DVD players free of charge. What is the probability that he will not have to pay for the DVD players? (Round your answer to three decimal places.)