Posted by susan on Thursday, March 10, 2011 at 1:56am.
The probability of getting a blue ball is 2/3 from a bag containing 6 blue and 3 red balls. 12 red balls are added to the bag then find the probability of getting a blue ball

maths  PsyDAG, Thursday, March 10, 2011 at 2:31am
6/21 = ?
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