CANNAINVESTOR Magazine December / January 2016 - Page 118

118

Because the host removes one of the doors with the goat behind it, in two of the three scenarios the Contest has a 100% chance of winning the car by changing their initial decision. Only if the car was behind the door they initially chose would they lose and there was only a one third chance of the car being there.

https://en.wikipedia.org/wiki/Monty_Hall_problem