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July 28, 2014

July 28, 2014

Posted by **Eric** on Tuesday, September 13, 2011 at 11:30pm.

- Math -
**Blob**, Wednesday, September 14, 2011 at 1:57am2 * 5 = 10

- Math -
**Reiny**, Wednesday, September 14, 2011 at 9:27amBlob's answer is not correct.

This is like choosing 2 of 5, which is

C(5,2) = 5!/(3!2!) = 20

- Math -
**Kyle**, Tuesday, February 12, 2013 at 5:49pmAnn, Mara, Jenny, Tina, and Sue are sisters. Two of the five sisters must help their father at his business each Saturday. How Many Combinations of two sisters are possible?

- Math -
**Anonymous**, Tuesday, October 1, 2013 at 11:15pm20

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