Monty Hall Problem... For Newbies

I'm curious about how many people pick the correct answer to the Monty Hall problem when they first hear about it, so only answer the poll if you hadn't heard about the Monty Hall problem until now (and no looking up the answer before you respond).



There are a couple of threads about this problem already (here, and here), but none of them have polls attached.



The Situation:



You're on a game-show trying to win a new car. The car is behind one of three doors. Behind the other two doors are goats.



You pick one of the three doors at random and the presenter (who knows which door the car is behind) opens a door that you didn't pick, revealing a goat. (This is standard procedure for the show.)



The presenter then offers you a chance to change your mind and pick the remaining door instead.



The Problem:



Are you more likely to win the car if you stick with your original choice?

Are you more likely to win the car if you change your mind?

Does it even make a difference?



Now you know the problem, let us know what you think the right answer is in the poll above.

Obligatory XKCD reference



"A few minutes later, the goat from behind door C drives away in the car."

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