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- Jun 6, 2005
the answer is you change your mind, because your original pick of the door was based on a 33 1/3 chance. Now that there are only two left, your chance is a 66 2/3, not just 1/2.
you sir, fail.
No, you sir, fail. There are 2 doors, there is one car, 50/50. The chance of each having the car is the same. The 33.3 from the door that waseliminated is evenly distributed to the two doors left making them both 50%.
EDIT: I guess in theory both doors are 66.66% because the first door was a freebie allowing you to in a sense pick 2 doors the first time and not just one.