Usenet Newsgroups : rec.puzzles Hall of Fame The rec.puzzles Hall of Fame is a compilation of over 500 of the most popular puzzles that have been posted and discussed in the rec.puzzles newsgroup. In most cases a detailed solution has been provided. Many of these puzzles also appear in Braingle's own collection.

rec.puzzles Newsgroup FAQ Hall of Fame alt.brain.teasers Newsgroup FAQ

The Allais Paradox involves the choice between two alternatives:

	A. 89% chance of an unknown amount
	   10% chance of $1 million
	   1% chance of $1 million
	B. 89% chance of an unknown amount (the same amount as in A)
	   10% chance of $2.5 million
	   1% chance of nothing

What is the rational choice?  Does this choice remain the same if the
unknown amount is $1 million?  If it is nothing?

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