>>3038007You select one of the doors, you have a 33% chance of selecting the car.
After selecting a door but before the contents are revealed, one of the two goat doors are revealed, the implication being you either stick with your initial choice or you pick the third door with still unknown contents.
If the first door you picked was the car, then the two remaining doors are both goats, meaning switching will result in a goat.
If the first door you picked was a goat, then the third remaining door you'd be switching to is the car.
If you choose to switch, you will always get the opposite result of your initial choice.
You only had a 33% chance to get the car on your initial choice and a 66% chance of getting a goat, while switching will net you a 33% chance of a goat and a 66% chance of getting a car.
