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March 28, 2015

March 28, 2015

Posted by **William** on Thursday, July 31, 2014 at 10:23am.

- math -
**Steve**, Thursday, July 31, 2014 at 11:38amAll you want is the number of permutations for 3 out of 4:

4P3 = 4*3*2 = 24

You can pick the first in 4 ways.

Now there are 3 choices for the 2nd,

and 2 left for the 3rd.

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