document.write( "Question 1202522: An urn contains 15 green, 10 blue, and 11 red balls. You take 3 balls out of the urn without replacement. What is the probability that all three balls are of the same color? \n" ); document.write( "
Algebra.Com's Answer #837406 by Edwin McCravy(20060)\"\" \"About 
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document.write( "P(all green) = C(15,3)/C(36,3) = ?/? \r\n" );
document.write( "P(all blue) = C(10,3)/C(36,3) = ?/?\r\n" );
document.write( "P(all red) = C(11,3)/C(36,3) = ?/?\r\n" );
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document.write( "Those are mutually exclusive so we may add their probabilities:\r\n" );
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document.write( "P(all the same color) = P(all green) + P(all blue) + P(all red) = \r\n" );
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document.write( "?/? + ?/? + ?/? = ?/?\r\n" );
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document.write( "Edwin
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