A bag contains identical sized balls of different colours : 10 red, 9 white, 7 yellow, 2 blue and 1 black. Without looking into the bag, Paul takes out the balls one by one from it. What is the least number of balls Paul must take out to ensure that at least 3 balls have the same colour?

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Answers

2014-07-26T08:10:55+05:30
2014-07-29T10:52:28+05:30
Paul should take it out 7 to 8 balls 
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