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- If eleven members of a committee sit at a round table so that the President and Secretary always sit together
If eleven members of a committee sit at a round table so that the President and Secretary always sit together, then the number of arrangements is
A) 10 ! ×2
B) 10!
C) 9! ×2
D) None of these
Answers (1)
Circular Permutations (n-1)!
Treat President and Secretary as one unit,
Hence, (10-1)!=9!
Now, President and Secretary can be seated as 2! ways
(C) is Correct answer
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