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Assuming the balls to be identical excep...

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 (1) 880                 (2) 629                   (3) 630                       (4) 879

Text Solution

Verified by Experts

total ways= `11 xx 10 xx 8 = 880`
ans`-> 880 - 1`(no one is selected) = 879
option 3 is correct
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