An Example from my Probability Class I Need Help w/

[emp1346]

I think that yellowjack's original post is close to correct...

Firstly, 52c26 should be the number of ways a deck can be cut in half, and doesn't need to be doubled as this would redundantly count combinations...

Secondly, 26c13 should be the number of ways that the red cards can be divided up... However, I think you also need to consider that the black cards aren't necessarily divided up the same every time, which would bring in another 26c13...

Ultimately, the answer would then be:

26c13*26c13
----------- = .2181
52c26