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Known and Unknown Balls (Posted on 2010-05-19) Difficulty: 2 of 5
An urn contains 6 green balls and an unknown number, which is ≤ 6, of blue balls. Three balls are drawn successively at random, and not replaced and are all found to be blue.

Determine the probability that a green ball will be drawn at the next draw.

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
Some ThoughtsPosterior probabilitiesSteve Herman2010-05-20 10:00:38
Solutionsolution (spoiler)Charlie2010-05-19 13:29:27
Some ThoughtsPossible Solution ... but not sureSyzygy2010-05-19 12:49:45
Some ThoughtsNot enough informationSteve Herman2010-05-19 12:04:12
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