A bicycle shop owner has 10 mountain bicycles in his showroo

A bicycle shop owner has 10 mountain bicycles in his showroom. The owner wishes to select 4 of them to display at the upcoming outdoor sporting goods show at the Sports Arena. How many different ways can the group of 4 bicycles be selected?

Solution

As the order does not matter, we only do combinations.

Thus, there are 10C4 = 10!/(4!(10-4)!) = 210 ways. [ANSWER]