SOLUTION: how many ways can tim choose 2 out of 6 dvd's to buy?

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Question 854187: how many ways can tim choose 2 out of 6 dvd's to buy?
Answer by aditya2117(32) About Me  (Show Source):
You can put this solution on YOUR website!
2 out of 6 dvd's could be chosen in the following ways :
No. of ways = 6!/2*(6-2)!
= 6*5*4!/2*4!
= 30/2
= 15
Ans: 15 ways