February 26, 2017

Homework Help: math

Posted by Nicole on Thursday, January 13, 2011 at 9:51pm.

Cher has forgotten the combination to her locker. She knows it consists of four numbers -- 3, 5, 7, and 9 -- but she can't recall the order. She decides to try every possible order until she gets the right one.

How many possible orders are there?

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