You are told there are two envelopes. One contains twice as much money as the other one. You pick one but are allowed to change your mind after picking it. (You are equally likely to pick the one with less money as the one with more money.)
To figure out how much on average the other envelope should contain, one might average x/2 and 2x because one is equally likely to pick one as picking the other. Since this comes out to 5x/4, one might always change his or her mind. But wouldn't this end up with one never making up his or her mind?
close your eyes, grab an envelope, and walk away.
adding the amount in either envelope to what you have now gives you more than you have now, regardless of which envelope you chose.
too many times we go throuh life thinking about what could have been.
Posted by Jim
on 2004-07-29 11:27:56