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## virtus 3 years ago 10 people are arranged around a table. A chairperson and secretary are to be elected. How many arrangements are possible such s that the chairperson and secretary are opposite each other

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1. hba

Remember that a circular permutation is (n – 1)!

2. hba

so 9!2!

3. hba

is ur ans i guess

4. virtus

answer says 7! x 8

5. Hashir

its 8!

6. Hashir

because

7. hba

ohh ok i get it now remove the 2 people (chairperson and secretary) u have total 8 left acc to circular perm 7!

8. Hashir

the Secretary and president is not to be arranged

9. virtus

OHHHH i got it they are fixed right

10. Hashir

therefore the rest can be arranged

11. Hashir

thus 8!

12. Hashir

got it dumb pants

13. Hashir

???????

14. virtus

ya dumbpants has got it!

15. ujjwal

Suppose there is no chairperson and secretary. Now you have eight members. who can be arranged in 7! Now one among the pair of secretary and chairperson can be seated in 8 ways around the table ( the other will be just opposite). so, you have a total of 7! $$\times$$ 8

16. Hashir

i m doing the same thing .... @ujjwal

17. ujjwal

yeah! great Job!! @Hashir

18. Hashir

what the hell is what ?

19. Hashir

idk

20. hba

dude u are not allowed to ask for it

21. hba

@ujjwal

22. virtus

awks.... ummm well thanks everyone!

23. hba

welcome

24. Hashir

pleasure

25. ujjwal

Great! close it now @virtus

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