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Balls in an urn (Posted on 2008-11-11) Difficulty: 2 of 5
An urn contains a number of colored balls, with equal numbers of each color. Adding 20 balls of a new color to the urn would not change the probability of drawing (without replacement) two balls of the same color. How many balls are in the urn? (Before the extra balls are added.)

See The Solution Submitted by pcbouhid    
Rating: 3.5000 (2 votes)

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  Subject Author Date
SolutionSolutionPraneeth2008-11-12 07:02:32
Agreeded bottemiller2008-11-11 19:03:23
Computer Searched bottemiller2008-11-11 18:35:11
Solutioncomputer trial and errorCharlie2008-11-11 18:22:28
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