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Subject: Re: Nice riddle

Author: Fernando Villegas

Date: 15:25:51 01/08/02

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A brilliant case of counter-intuitive thinking. The most interesting part is ,
nevertheless, to explain why the common sense at first glance, like your friend,
believes the chance is the same all the time  The trick, of course, is that
common sense does not see that if you stick to yout first choice after the guy
opened a door, you stick with the first kind of bet at 1/3 chances. But If you
change your mind, you get a better 2/3 situation because it is like you have
been allowed to do TWO bets, one of them performed by the other guy. Here lay
the cunning part of the riddle, as much you does not se at the first lance that
the wizard is like yoursef in disguise.
My best
Fernando



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