Q. In how many ways can 15 members of a council sit along a circular table, when the Secretary is to sit on one side of the chairman and the Deputy Secretary on the other side?
A) $2 \times 12!$
B) 24
C) $2 \times 15!$
D) None of these
Explanation
(a)
Since total number are 15, but three special members constitute one member.
Therefore, required number of arrangements are $12! \times 2,$ because, chairman remains between the two specified persons and person can sit in two ways
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.