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13. Thrfact509NHU ne Wins/loses. All Ind...

13. Thrfact509NHU ne Wins/loses. All India 2010A bag contains 4 balls. Two balls aredrawn at random (without replacement)and are found to be white. What is theprobability that all the balls in the bagare white? All India 2016, 2014totkneadanLet y denote the number of colleges

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