Date: Feb 5, 2013 2:11 PM Author: Scott Berg Subject: Re: how many ways to pick two teams of 10 out of a group of 20 people
"G Patel" <email@example.com> wrote in message
> Is it 20 choose 10 or do I have to divide by 2?
are each of the people, unique ?
are there any biological twins dressed alike ?
are any of these people identical to each other ?