If eleven members of a committee sit at a round table so tha... | Mathematics | SolveeIt | Solveeit

Today, August 18

Question

If eleven members of a committee sit at a round table so that the President and Secretary always sit together, then the number of arrangements is

A

$10! \times 2$

B

$10!$

C

$9! \times 2$

D

$11 ! \times 2$

Answer

$9! \times 2$

Explanation

Solution

Since, out of eleven members, two members sit together, then the number of arrangements $= 9! \times 2$ ( $\because$ two members can sit in two ways.)