Posted by leigh on Sunday, February 5, 2012 at 1:28pm.
A company employs six people and plans to select a group of two of these employees to receive advanced training. How many ways can the group of two employees be selected?

math  Reiny, Sunday, February 5, 2012 at 1:31pm
choose 2 from 6
= C(6,2)
= 6!/(4!2!) = 15