Question 1085006
20C1: 20!/(20-1)!
{{{20C1 = 20!/(20-1)! = 20!/19! = 20}}}
So, select 1 out of 20 where order doesn't matter equals 20 different ways the coach can select the captain (he has 20 people to choose from, that's 20 ways so this particular problem you can solve with logic if you wanted to).