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

It is currently 30 Sep 2014, 22:03

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

If a committee of 3 people is to be selected from among 5

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
User avatar
Joined: 10 Aug 2007
Posts: 22
Followers: 0

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

If a committee of 3 people is to be selected from among 5 [#permalink] New post 13 Oct 2007, 07:15
If a committee of 3 people is to be selected from among 5 married couples so that the committee does not include two people who are married to each other, how many such committees are possible

A - 20
B - 40
C - 50
D - 80
E - 120

Please help me solve this question!!
VP
VP
User avatar
Joined: 08 Jun 2005
Posts: 1156
Followers: 6

Kudos [?]: 116 [0], given: 0

 [#permalink] New post 13 Oct 2007, 07:28
10C3 = 120 ---> choosing any three people from ten.

5C1= 5 ---> choosing a married couple out of five

8C1 = 8 ---> choosing the third person on the committee.

120 - 5*8 = 80

the answer is (D)

read more ---> http://www.themathpage.com/aPreCalc/per ... ations.htm

:)
Intern
Intern
User avatar
Joined: 10 Aug 2007
Posts: 22
Followers: 0

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

 [#permalink] New post 13 Oct 2007, 07:38
[quote="KillerSquirrel"]10C3 = 120 ---> choosing any three people from ten.

5C1= 5 ---> choosing a married couple out of five

8C1 = 8 ---> choosing the third person on the committee.

120 - 5*8 = 80

the answer is (D)

read more ---> http://www.themathpage.com/aPreCalc/per ... ations.htm

wow, thank you for your quick reply, I could understand it now! Really appreciate your help!! :)
Director
Director
avatar
Joined: 10 Feb 2006
Posts: 664
Followers: 3

Kudos [?]: 59 [0], given: 0

 [#permalink] New post 19 Oct 2007, 22:13
8C1 = 8 ---> choosing the third person on the committee.

How did you get that 8 from?
_________________

GMAT the final frontie!!!.

VP
VP
User avatar
Joined: 08 Jun 2005
Posts: 1156
Followers: 6

Kudos [?]: 116 [0], given: 0

 [#permalink] New post 19 Oct 2007, 22:52
alimad wrote:
8C1 = 8 ---> choosing the third person on the committee.

How did you get that 8 from?


Since started with ten people, and already choose a married couple (i.e. two people) you are left with 8 people to choose from (i.e. 10-2 = 8) and you need to fill one more place on the committee.

:)
VP
VP
avatar
Joined: 28 Mar 2006
Posts: 1389
Followers: 2

Kudos [?]: 18 [0], given: 0

 [#permalink] New post 21 Oct 2007, 06:33
10*8*6/3! = 80

Divide by 3! to remove the duplication of count
Intern
Intern
User avatar
Joined: 10 Aug 2007
Posts: 22
Followers: 0

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

 [#permalink] New post 21 Oct 2007, 08:35
[quote="trivikram"]10*8*6/3! = 80

Divide by 3! to remove the duplication of count[/quote]

Could you plz explain your fomular a little bit more? I dont understand the way to put these numbers together. thanks :)
  [#permalink] 21 Oct 2007, 08:35
    Similar topics Author Replies Last post
Similar
Topics:
If a committee of 3 people is to be selected from among 5 TOUGH GUY 5 26 Dec 2005, 08:53
If a committee of 3 people is to be selected from among 5 sem 11 01 Dec 2005, 13:33
If a committee of 3 people is to be selected from among 5 pb_india 3 21 May 2005, 19:43
If a committee of 3 people is to be selected from among 5 chunjuwu 2 07 Feb 2005, 04:36
If a committee of 3 people is to be selected from among 5 DLMD 10 06 Feb 2005, 10:23
Display posts from previous: Sort by

If a committee of 3 people is to be selected from among 5

  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®.