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Posted by: Mister Necroer
Posted by: SubtleSpartan
It's still 1/2 regardless of whether you pick door 1 or 2.
At least someone has sense.
You're both wrong.
You had a 1/3 chance if getting right at first, so there's a greater probability of the prize being behind one of the two doors you didn't choose. The host then showing you that one of the doors you didn't pick doesn't have the prize behind means that there's then the greatest probability of it being behind the last of two doors that you didnt't pick first time around.
[Edited on 12.21.2012 5:48 AM PST]