There are 3 doors, behind which are two goats and a car.
You pick a door (call it door A).
The game show host, examines the other doors (B & C) and always opens one of them with a goat (Both doors might have goats; he’ll randomly pick one to open)

Do you stick with door A (original guess) or switch to the other unopened door? Does it matter?

Question

There are 3 doors, behind which are two goats and a car.
You pick a door (call it door A).
The game show host, examines the other doors (B & C) and always opens one of them with a goat (Both doors might have goats; he’ll randomly pick one to open)

Do you stick with door A (original guess) or switch to the other unopened door? Does it matter?

anonymous · Answer

if I remember correctly, one event has a probability of 1/3 and the other is 2/3. But don't now which is which.

anonymous · Answer

You switch because the probability is increased to 2/3.

anonymous · Answer

why is that?

anonymous · Answer

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

anonymous · Answer

yea, thanks buddy, fantastic help. never would have thought of or tried googling it.

agent0smith · Answer

Always switch.