SOLUTION: how many different groups of 2000 people each could be formed from 2003 people?

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Question 1077483: how many different groups of 2000 people each could be formed from 2003 people?
Found 2 solutions by Boreal, Alan3354:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
It would be 2003C2000=
2003*2002*2001/6, the six coming from 3!
=1,337,337,001

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
how many different groups of 2000 people each could be formed from 2003 people?
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Pick 3 people to leave out.
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---> 2003*2002*2001
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But, picking A, B & C is the same as B, C & A --> 3*2*1 = 6
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Groups = 2003*2002*2001/6
= 1337337001