Re: Can you help?

Jackie Singleton (
Thu, 17 Apr 1997 20:54:28 -0400 wrote:
> A friend of mine gave me the following question. Ihope that you can give
> the answer.
> A jar contains one organ either a brain or a heart. An Alien puts a brain in
> the jar. He then pulls out a brain. What`s the probability that the jar
> originally contained a brain. I think that this is the "LETS MAKE A DEAL"
> problem and I feel that the answer is 2/3 but then sometimes I think it is
> 3/4?
I agree with Duncan's answer of 1/2 but maybe this is a question for
"Marilyn Von Savant" (if that is how she spells her name.)
Jackie Singleton