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© 140 II 170 (u) 1 190 19. Assuming the ...

© 140 II 170 (u) 1 190 19. 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 : [2012] (a) 880 (b) 629 ( 630 (d) 879 20. Let T, be the number of all possible trinnalan 11

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