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The number of seating arrangements such ...

The number of seating arrangements such that each person has exactly one neighbour.

A

`.^(m-n)P_(n)`

B

`.^(m-n//2)P_(n//2)xxn!`

C

`.^(m-n+1)P_(n//2)xxn!`

D

`.^(m-n+1)P_(n//2)`

Text Solution

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The correct Answer is:
b
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