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January 31, 2015

January 31, 2015

Posted by **Katie** on Monday, October 3, 2011 at 8:43pm.

- math -
**Damon**, Monday, October 3, 2011 at 8:55pmcombinations of 5 letters taken four at a time

= 5!/[4! (5-4)!] = 5

- math -
**Reiny**, Monday, October 3, 2011 at 9:07pmThe letters are to be arranged, so order matters.

number of ways = 5x4x3x2 = 120

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