rationalskepticism.org

Lifeboat for the rational mind :D
http://www.rationalskepticism.org/

Why don't they sell scratch cards in betting shops?

http://www.rationalskepticism.org/viewtopic.php?p=2665366#p2665366

Posted: Nov 30, 2018 12:56 pm
by LucidFlight
N!/(N-k)!k!

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