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Numberof ways of selecting 3 out of the 8 stations such that no 2are consecutive

Numberof ways of selecting 3 out of the 8 stations such that no 2are consecutive 

Grade:12

1 Answers

Arun
25750 Points
5 years ago
Dear student
 
think this in this way that
 
you have to pick two places between 7 spaces between 8 things.
which will be 7C2 = 21

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