+0  
 
0
80
1
avatar

I have twenty balls numbered 1 through 20 in a bin. In how many ways can I select 2 balls, if the order in which I draw them doesn't matter?

 Jun 22, 2020
 #1
avatar
0

You can select them in : 20C2 ways =190 ways.

 Jun 22, 2020

29 Online Users

avatar
avatar
avatar
avatar