Question

3 bolts and 3 nuts are in a box. 2 parts are chosen at random. Find the probability that 1 is a bolt and 1 is a nut.

Answer 1

number of ways to choose 2 from 5 items = C(5,2) = 10
number of ways to choose 1 bolt from3 and 1 nut from 3
= C(3,1) * C(3,1) = 9

prob(your event) = 9/10