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Picking Among Two Pool Balls


Best Answer bonanova, 27 April 2013 - 05:57 AM

Spoiler for roughly

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#1 BMAD

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Posted 27 April 2013 - 03:25 AM

A cloth bag contains a pool ball, which is known to be a solid ball.  A second pool ball is chosen at random in such a way that it is equally likely to be a solid or a stripe ball.  The ball is added to the bag, the bag is shaken, and a ball is drawn at random.  This ball proves to be a solid.  What is the probability that the ball remaining in the bag is also a solid?

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#2 bonanova

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Posted 27 April 2013 - 05:57 AM   Best Answer

Spoiler for roughly


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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell




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