Question

they seat themselves
3. In how many ways can 11 members of a committee sit at a round table so
that the secretary and the joint secretary are always the neighbours of the
president?​

Answer 1

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Take (president + secretaries) as 1 unit.

Now total ways =12+1=13!

But , Secretaries among them can exchange in 2 way

Total possibilities =13!×2!

$\huge\mathfrak\red{itz\:jyotsana☺}$

Answer 2

Answer:

Take ( president + secretaries ) as 1 unit

Now , Total ways = 12 + 1 = 13

But , Secretaries among them can exchange is 2 ways

Total possibility = 13 × 2