Probability

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Question : 72 of 127
 
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There are three boxes with the following composition:
Box 1: 5 Red +7 White +6 Blue balls
Box II: 4 Red +8 White +6 Blue balls
Box III: 3 Red +4 White +2 Blue balls
If one ball is drawn (from each) at random, then what is the probability that they would be of same colour?
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