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Circular Permutation

20 persons we...

Question

20 persons were invited to a party. In how many ways they and the host can be seated at a circular table ?In how many of these ways will two particular persons be seated on either side of the host.

A

20!, 2!, 18!

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B

18!, 2!, 20!

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C

19!, 18!

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D

19!, 19!

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Solution

The correct option is A $20!, 2!, 18!$

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