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Simpler probability problem? (Posted on 2015-08-11) Difficulty: 1 of 5
An urn contains 5 black and 20 white marbles. They are to be drawn one at a time until all of one color has been exhausted.

What is the probability that the color of the first draw correctly predicts the first color exhausted?

No Solution Yet Submitted by Jer    
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re: re. difficulty level | Comment 4 of 14 |
(In reply to re. difficulty level by Ady TZIDON)

Sorry if the problem was vague.   By 'correctly predicts' I meant 'can be correctly used as a prediction of'

As for the short time in the queue there is a major shortage of +3s lately.  This was one of the only ones. People that can do so need to get in there are vote. 

  Posted by Jer on 2015-08-11 23:13:00
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