A host invites 20 persons for a party. T...

A host invites 20 persons for a party. The number of ways they can be seated at a circular table such that two particular persons be seated on either side of the host is

A

`18 !`

B

`2 .18 !`

C

`19 !`

D

`2 .19 !`

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The correct Answer is:

A

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