Question

A box contains 23 transistors,6 of which are defective. If 6 are selected at random, find the probility that none are defective ?

Answer 1

`|\Omega|=C(23,6)=(23!)/(6!17!)=100947\\ |A|=C(17,6)=(17!)/(6!11!)=12376\\\\ P(A)=(12376)/(100947)=(1768)/(14421)`