Answer the questions below.
(a) From a collection of 50 store customers, 3 are to be chosen to receive a special gift. How many
groups of 3 customers are possible?
(b) There are 14 European cities that Susan would eventually like to visit. On her next vacation,
though, she only has time to visit 4 of the cities: one on Monday, one on Tuesday, one on
Wednesday, and one on Thursday. She is now trying to make a schedule of which city she'll visit on
which day. How many different schedules are possible? (Assume that she will not visit a city more
than once.)