Author: Oliver Y.
Date: 15:41:02 01/09/02
Go up one level in this thread
On January 07, 2002 at 20:57:57, Dann Corbit wrote: >On January 07, 2002 at 20:52:43, K. Burcham wrote: > >> >> >>our local sunday paper has a regular column with write in problems. >>this column is by marylin von sant(spelling?). supposedly she has the highest >>female iq in the world. i remember this problem was in her column. >>her answer was once any door is opened, and only two doors are left, >>the original odds of 33% are still there, even though there are only two doors >>to choose from. i agree with you, it also seems to me that the odds change to >>50% once there are only two doors left. >> >>we have an engineer at work that has a PHD. so this is the problem i posed to >>him with a twist. this engineer also agrees with marylin. so i asked him once >>the first door is open, then lets stop the original story, and add this to it. >>now we bring in someone else, now he chooses. what are the odds for the second >>person that is choosing. the doctors answer was 50/50 for the second person, but >>he said it was still 33% for the original person that chose when there was three >>doors. > >Start with an infinte number of doors. The odds that you picked the right one >are zero. Will you like to pick again, after being shown a wrong one? > >Continue this process, working your way down to 2 doors. Now your odds are 50%. Wrong. (but it depends on what Monty knows...) snip
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