The Governing Council of an institute has 15 members and wants to hold its annual meeting. In how many ways can the council be seated around the table, if the Chairman and the Vice-Chairman are never seated together?

Question

anonymous · Answer

13persons 2persons -!

anonymous · Answer

13+1 (chairmain+vice chairman)=14 =13!

ganeshie8 · Answer

not seated together  =   "total permutations" - "seated together"

anonymous · Answer

2 persons seated in 2 ways so 13!*2

ganeshie8 · Answer

Looks good ! subtract it from total permutations

ganeshie8 · Answer

whut ?

anonymous · Answer

13!=14!-2!

ganeshie8 · Answer

total permutations = (15-1)! = 14!
rught ?

ganeshie8 · Answer

seated together  =  13!*2

anonymous · Answer

yes

ganeshie8 · Answer

so, not seated together  = 14! - 13!*2

anonymous · Answer

13+1 (chairmain+vice chairman)=14 =13!---> seated together

ganeshie8 · Answer

you got `13!*2` for seated together, right ?

anonymous · Answer

Hey dj2 I actually did like a little tutorial on permutations and probability a while back, so if you're interested just follow this link: http://openstudy.com/users/iambatman#/updates/539aaeb2e4b0eb8de56cd305

anonymous · Answer

dg2*

anonymous · Answer

i would always ask people to post forum to study.u posted without asking.thank you