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April 10th, 2011, 08:24 AM  #1 
Senior Member Joined: Mar 2011 Posts: 105 Thanks: 0  Combination and Permutation
Combination MAth Problem? we have 5 red pens, 4 green pens,and 2 blue pens How many different ways can we choose 2 of these pens to buy if a, the order is important b, the order is not important 
April 10th, 2011, 01:46 PM  #2  
Math Team Joined: Dec 2006 From: Lexington, MA Posts: 3,267 Thanks: 408  Re: Combination and Permutation Hello, daivinhtran! Quote:
[color=beige]. . [/color] [color=beige]. . [/color] [color=beige]. . [/color] [color=beige]. . [/color] Quote:
 

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