Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 25 May 2013, 16:04
Customize  |  Hide

Search
Register
New posts
Unanswered

PS (Counting Methods)

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Senior Manager
Senior Manager
Joined: 22 Sep 2005
Posts: 282
Followers: 1

Kudos [?]: 28 [0], given: 1

GMAT Tests User
PS (Counting Methods) [#permalink] New post 13 Dec 2008, 11:04
00:00

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
A student has to answer 7 out of 10 questions in an examination. If at least 3 of the first 5 questions have to be answered, how many ways can the questions be answered?

A) 20
B) 30
C) 110
D) 40
E) 10
SVP
SVP
User avatar
Joined: 07 Nov 2007
Posts: 1840
Location: New York
Followers: 20

Kudos [?]: 292 [0], given: 5

GMAT Tests User
Re: PS (Counting Methods) [#permalink] New post 13 Dec 2008, 11:17
netcaesar wrote:
A student has to answer 7 out of 10 questions in an examination. If at least 3 of the first 5 questions have to be answered, how many ways can the questions be answered?

A) 20
B) 30
C) 110
D) 40
E) 10



5C3*5C4 + 5C4*5C3+5C5*5C2
= 10*5 + 5*10 + 1*10 =110

C
_________________

Your attitude determines your altitude
Smiling wins more friends than frowning

SVP
SVP
User avatar
Joined: 07 Nov 2007
Posts: 1840
Location: New York
Followers: 20

Kudos [?]: 292 [0], given: 5

GMAT Tests User
Re: PS (Counting Methods) [#permalink] New post 13 Dec 2008, 12:12
scthakur wrote:
x2suresh, I think you meant C.


You are right.. thanks. I modified the original post.
_________________

Your attitude determines your altitude
Smiling wins more friends than frowning

Re: PS (Counting Methods)   [#permalink] 13 Dec 2008, 12:12
    Similar topics Author Replies Last post
Similar
Topics:
 New posts Counting methods # 17 Konstantin Lynov 3 11 Aug 2003, 07:43
New posts Counting methods # 23 Konstantin Lynov 3 11 Aug 2003, 07:52
New posts PS : Counting Methods..MINIMUM Praetorian 8 01 Oct 2003, 16:06
New posts counting methods plaza202 4 11 Nov 2007, 21:23
New posts 1 EXPERTS_POSTS_IN_THIS_TOPIC PS: Counting Methods Nusa84 2 19 Jun 2010, 09:59
Display posts from previous: Sort by

PS (Counting Methods)

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma, IanStewart

Search for:


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®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com