If we have 3 doors, 2 goats and 1 car.
You don’t make a choice on the first sequence.. the announcer just opens one of the goat doors.
What is the probability of choice between the two remaining doors that either is a goat or a car, and how is this example different than the one given earlier.
The real importance it the independence of trails when doing the choosing. We are asking for the probability of the next decision, not the probability of the pattern of events leading up to the choice.