Recent content by mosesbro

  1. M

    Undergrad 3 doors probability question / puzzler

    "While the host knows if he has only one choice of door to open, the chooser does not know that." This does assume that you do know that the host can only open an empty door that you did not choose. While you do not know if you limited his choices of doors, you do know that there is a 2/3...
  2. M

    Undergrad 3 doors probability question / puzzler

    I did some more thinking on this, and I think I have the explanation. You chose door 1, which has a 1/3 chance of being right. The gamemaster will open one of the other doors, but it has to be empty, so there is a 2/3 chance that the prize had something to do with his opening door 2, since there...
  3. M

    Undergrad 3 doors probability question / puzzler

    OK, I'm not getting this. My brother-in-law tried to explain it to me and I think he and everybody is all wet. Here's what I don't get: After the first door is opened, you, the contestant, has another choice. Basically, you have to disregard your initial choice and make a new choice. So now you...