Quote:
Originally Posted by Gasoline Fumes
Two doors remain, a car and a goat. You now get to switch or stay. How is that different than picking from two doors? Why would the original choice matter? And is a Lincoln Continental better than a goat?
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Before he opens the door the chance is 66.7% that the car is behind one of the doors you did not choose.
When he opens one of those doors the chance the car is behind the other door is still 66.7 %, unless he accidentally opens the door with the car in which case you'll choose that door.
Two doors remain, the one you chose at first with a 33.3% that it has the car, and the door the host did not (could not) open.
As your door still has that same 33.3% chance of having a car behind it (the car did not move) the remaining door has that 66.7% chance.
Swap and sell the Lincoln for a herd of goats.
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