help please

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 10% of all adults deliberately do a one-time fling and feel no guilt about it! In a group of ten adult friends, what is the probability of the following? (Round your answers to three decimal places.) In USE SALT (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