View Single Post
  #2  
Old 11-02-2007, 10:57 PM
tabako tabako is offline
Senior Member
 
Join Date: Sep 2006
Location: Madison
Posts: 1,393
Default Re: help with math problem

You need to use bayes' theorem to find the probability that you selected the two blue marbles from a given hat, and then from there it is straight forward to calculate the chance that you grab a red marble from the other hat.
Reply With Quote