[nomadking]

Originally Posted by spiderplant

Ok, let's play with a million boxes. That's 999,999 goats and a car.

You pick a box. The chance that you have picked the car is 1 in a million.

So the chance that the car is in one of the other boxes is 999,999 in a million.

The host now opens 999,998 boxes that he knows contain a goat. So the chance that the car is in the one remaining box is 999,999 in a million.

So do you want to keep your original pick (1 in a million), or do you want to swap (999,999 in a million)? Do you like goats?

Doesn't matter if you get your 1st round choice correct, you don't win at that stage.

You are then asked whether you want to stay with your original choice of door. Or whether you want to switch to the other remaining door.

There is always just the one other door.