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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<div class='qna-opt

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

Option: 1

880


Option: 2

629


Option: 3

630


Option: 4

879


Answers (1)

Number of ways in which one or more balls can be selected from 10 white, 9 green, 7 black balls is

=(10+1)(9+1)(7+1)-1

=880-1=879\; ways

Posted by

Ramraj Saini

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