The onetime fling Have you ever purchased an article of clot

The one-time fling! Have you ever purchased an article of clothing (dress, sports jacket, etc.), worn the item once to a party, and then returned the purchase? This is called a one-time fling. About 20% of all adults deliberately do a one-time fling and feel no guilt about it! In a group of six adult friends, what is the probability of the following? (Round your answers to three decimal places.) (a) no one has done a one-time fling (b) at least one person has done a one-time fling (c) no more than two people have done a one-time fling

Solution

A) (0.95)^9 = 0.6302

B) 1 - (0.95)^9 = 1 - 0.6302 = 0.3698

C) (0.95)^9 + 9C1*(0.95)^8*(0.05) + 9C2 * (0.95)^7 * (0.05)^2 = 0.6302 + 0.2985 + 0.0629 = 0.9916