20 persons are invited for a party. In how many different ways can the – McqOptions

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1.	20 persons are invited for a party. In how many different ways can they and the host be seated at a circular table, if the two particular persons are to be seated on either side of the host [IIT 1977]
A.	\[20\ !\]
B.	\[2\ .\ 18\ !\]
C.	\[18\ !\]
D.	None of these
Answer» C. \[18\ !\]

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