Kasz216 on 03 December 2010
Ah, the Marilyn Vos Savant problem... hah.
The trick is... you have a 1 in 3 chance of picking the right door.
and a 2 in 3 chance of picking the wrong door.
The fact that one door is wrong is not really new information because you already knew that one of the two doors was going to be wrong... and the host DOESN'T open the doors randomly.
