[BruceZ]

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basically he opens a losing door and you now get to pick your door again with 50/50 odds. by not switching you are in effect re-choosing door A vs. door B which is no more likely now to have the prize than it was before.

[/ QUOTE ]

It is not 50/50, and I just showed you 2 different ways why Monte's choice makes door B more likely, one of which spelled out the proof using Bayes' theorem. You have done nothing to argue against these proofs other than to make false statements contradicting them.

The answer to this question is well-known, the solutions I posted are correct, and this problem has been analyzed to death on this forum. If you don't understand the proofs presented, then ask qustions, or go elsewhere on the net where you can find an explanation that you do understand. Please do not interpret this thread as an invitation to post any more erroneous replies.