i think it goes something like this...
your first choices are on the left, your option to stick/change is the middle and the outcome is on the right proving you should always change because....
goat - stick = goat
- change = car
goat - stick = goat
- change = car
car - stick = car
- change = goat
as you can see, statistically if you change your choice you have a 2in3 chance of winning the car (right hand row, across from change, 2 out of the 3 show car) where as if you stick you only have a 1in3 chance (right row again across from stick, 1 of the 3 gives you a car)
if this is not clear enough i could draw it and scan it in but i feel that would be a little excesive for this...
:ermm: