1 A container contains 36 light bulbs four of which are def

1 : A container contains 36 light bulbs, four of which are defective. What is the probability that, if a sample of eight is chosen at random from the carton of bulbs, x will be defective?

Solution

It can be seen as total minus the case when all the pieces are non-defective

= 1-(32C8)/36C8

= 1-(28*27*26*25/(36*35*34*33)

=0.652