Posted by bballer on Thursday, September 27, 2012 at 12:44am.
9!/(1!*3!*3!)
you take the total amount of letters you have factorial, divided by each of you different types of letters factorial. the reason that there is a 1! in the beginning is because you have the first two A's in the front, so they won't be going anywhere, leaving you with 1 A, therefore, 1!.
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