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  • A box contains 5 different red and 6 different white balls. In how many ways 6 balls be selected so that there are atleast two balls of each colour?

A box contains 5 different red and 6 different white balls. In how many ways 6 balls be selected so that there are atleast two balls of each colour?

Answers (1)

For selecting 6 balls so that atleast two balls of each colours = 5c2*6c4 + 5c3*6c3 + 5c4*6c2
                                                                                                 = 10*15 + 10*20 + 5*15 
                                                                                                 =150 + 200 + 75
                                                                                                 = 425 

Posted by

Satyajeet Kumar

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