Re: Fun with Bayes' Theorem

From: Adrian Tymes (
Date: Fri May 04 2001 - 10:53:50 MDT

Lee Corbin wrote:
> 1. There are two bags, each with 10 coins. Half the coins
> in the first bag are counterfeit, and all the coins in
> the second bag are counterfeit. Someone hands you a bag,
> and you happen to pull a coin out of that bag and examine
> it. If you see that the coin is counterfeit, what is the
> probability that you were handed the counterfeit bag?

Zero. It isn't the bag that's counterfeit, it's the coins. ;)

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