| nintendo_fanboy said: sorry, this one is too classic. you have to change, because you had a chance of 1/3 to pick the right box at the beginning. after he reveals one wrong box, the remaining box contains not only it's own third chance to be the right one, but also the third chance of the other box, which makes it 2/3. Probably this is too complicated, so I'll show all possible situations: 1. Situation: A X The moderator either opens B or C. Here you loose if you change, because you were standing on the right box. |
Besides for that fact that repicking is in violation of the rules...
That is two different situations. First, he picks B, second he picks C. So there are 4 situations total. Two of them are good if you stay where you are, and two of them are good if you move.
Even if you ignore the rules, it is still 50 / 50.
