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Question
Out of 10 white, 9 black and 7 red balls, the number of ways in which selection of one or more balls can be made, is_______.
Out of 10 white, 9 black and 7 red balls, the number of ways in which selection of one or more balls can be made, is_______.
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Solution
The correct option is C 879
Total numbers of ways are
(10 + 1)(9 + 1)(7 + 1)
Since, we have to select at least one ball
Required numbers of ways are
=(10+1)(9+1)(7+1)−1=11×10×8−1=879
879
Total numbers of ways are
(10 + 1)(9 + 1)(7 + 1)
Since, we have to select at least one ball
Required numbers of ways are
=(10+1)(9+1)(7+1)−1=11×10×8−1=879
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