SOLUTION: A raffle requires the purchase of a ticket that has 4 different numbers take from {1,2,3,...,20}. The order of the numbers does not matter. How many different raffle tickets are th
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Question 1075361: A raffle requires the purchase of a ticket that has 4 different numbers take from {1,2,3,...,20}. The order of the numbers does not matter. How many different raffle tickets are there? Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! This is 20C4=20!/16!4!
=20*19*18*17/24
=5*19*3*17 (by canceling) =95*51=4845.
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