Question

21 members of a council sit on a round table .In how many ways secretary and joint secretary can sit on both side on the chairman​

Answer 1

Step-by-step explanation:

Given 21 members of a council sit on a round table.In how many ways secretary and joint secretary can sit on both side of the chairman

• The members of a council sit on a round table. They are 21 in number.
• According to question secretary and joint secretary can sit on both side of the chairman. This can be done in 2 ways.
• Now remaining members will be 21 – 3 = 18
• So 18 members can sit on a round table in 18! Ways

Therefore total number of ways will be 2 x 18!

Reference link will be

https://brainly.in/question/14602144