单选题

There are 3 doors, behind which are t...

Question

There are 3 doors, behind which are two goats and a car.

You pick a door (call it door A). You’re hoping for the car of course.

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)

So what is the chance of winning the game if you switch doors?

A. 1/2

B. 1/3

C. 2/3

D. 1