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JEE Main & Advanced AIEEE Solved Paper-2012

  • question_answer
    Assuming the balls to be identical except for difference in colours, the number of ways in which one or more balls can be selected from 10 white, 9 green and 7 black balls is:   AIEEE  Solved  Paper-2012

    A) 880                                           

    B) 629 

    C) 630                                           

    D) 879

    Correct Answer: D

    Solution :

                 \[(10+1)(9+1)(7+1)-1=11.10.8-1=879\]


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