Find all School-related info fast with the new School-Specific MBA Forum

It is currently 24 Apr 2014, 14:41

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

circular perm

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
CEO
CEO
User avatar
Joined: 21 Jan 2007
Posts: 2775
Location: New York City
Followers: 6

Kudos [?]: 171 [0], given: 4

GMAT Tests User
circular perm [#permalink] New post 13 Mar 2008, 08:43
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
6 guys (let's call them ABCDEF) sit around a circular table. If the AB must always sit together, and C must face the door, how many arrangements are possible? please explain your work...
_________________

You tried your best and you failed miserably. The lesson is 'never try'. -Homer Simpson

CEO
CEO
User avatar
Joined: 17 Nov 2007
Posts: 3599
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 327

Kudos [?]: 1575 [0], given: 354

GMAT ToolKit User GMAT Tests User Premium Member
Re: circular perm [#permalink] New post 13 Mar 2008, 09:19
Expert's post
48

1. "C must face the door" - the condition fixes circular shifts.
2. "the AB must always sit together" - we can consider AB one object, but count it twice as AB and BA .
3. We have 4 objects (3 guys and one couple :)): 4P4=4!=24
4. finally, N=24*2=48
_________________

NEW! GMAT ToolKit 2 (iOS) / GMAT ToolKit (Android) - The must have GMAT prep app | PrepGame

Senior Manager
Senior Manager
Joined: 15 Aug 2007
Posts: 256
Schools: Chicago Booth
Followers: 1

Kudos [?]: 49 [0], given: 0

Re: circular perm [#permalink] New post 13 Mar 2008, 10:32
48 it is

It looks like a circular permutation problem, but is a liner instead.
Manager
Manager
Joined: 27 Jul 2010
Posts: 197
Location: Prague
Schools: University of Economics Prague
Followers: 1

Kudos [?]: 14 [0], given: 15

GMAT ToolKit User GMAT Tests User
Re: circular perm [#permalink] New post 20 Jan 2011, 08:49
Is it linear because the one guy must face the door?
_________________

You want somethin', go get it. Period!

Re: circular perm   [#permalink] 20 Jan 2011, 08:49
    Similar topics Author Replies Last post
Similar
Topics:
New posts Classic Comb/Perm/Ps Antmavel 8 08 Sep 2004, 17:27
New posts Perm & Comb trulyblessed 3 15 Sep 2005, 20:35
New posts perm or comb? ps joemama142000 4 18 Jan 2006, 10:20
Moved topic Experts publish their posts in the topic circular perm bmwhype2 3 13 Mar 2008, 08:43
New posts Perms + Combination shirley 2 20 May 2012, 11:19
Display posts from previous: Sort by

circular perm

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.