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March 20th, 2016, 11:56 AM  #1 
Banned Camp Joined: Dec 2013 Posts: 1,117 Thanks: 41  Combinatorics : counting
Hi, We have a grid 6x6. We want to place on each square one of 36 tokens. 18 tokens are red : 6 copies of tokens numbered from 1 to 3. 18 tokens are blue : 6 copies of tokens numbered from 1 to 3. In how many different ways could we place them all? Thank you. Ps : It is not a homework. 
March 24th, 2016, 05:20 AM  #2 
Banned Camp Joined: Dec 2013 Posts: 1,117 Thanks: 41 
36!/((3!)^6) Am I wrong? 

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combinatorics, counting 
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