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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

A

630

B

879

C

880

D

629

Text Solution

Verified by Experts

The correct Answer is:
B
Required number of ways
`=(10+1)(9+1)(7+1)-1=880-1=879`
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