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December 20, 2014

December 20, 2014

Posted by **kelsey** on Tuesday, January 11, 2011 at 3:40pm.

- Math -
**Reiny**, Tuesday, January 11, 2011 at 5:07pmWow, where can I play this game????

I will assume that 0 is not one of the cards.

number of possible pairs is 10x10 or 100

pairs which have a sum of 9 are:

18, 27, 36, 45, 54, 63, 72, and 81 or 8 of them

so prob that it will have a sum of 9 is 8/100 or 2/25

let me at this game!!!

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