Hi Al,

>I'm amazed that both you and Jim Booth have it all wrong! :-) You've both fallen into the trap of making something more complicated than it is. Consider these incontrovertible facts:

Actually, I had a similar question once in school and still remember it, because the first time I said it's fifty-fifty using the same argumentation as you did. :) I always try not to repeat mistakes too often. *g*

I know, "logic" says, it must be 50%, but run my program. You can see that it's really 2:1 for changing the door.

Christof