data sufficiency : GMAT Quantitative Section
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 22 Jan 2017, 17:28

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# data sufficiency

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:

### Hide Tags

Intern
Joined: 17 Dec 2006
Posts: 39
Followers: 0

Kudos [?]: 17 [0], given: 0

### Show Tags

03 Jul 2008, 04:09
a total of 9 women and 12 men reside in the 21 apartment that are in a certain apartment building, one person to each apartment. If a pool taker is to select one of the apartments at random, what is the probability that the resident of the apartment selected will be a women who is a student?
1) of the women, 4 are student
2) of the women, 5 are not student
the answer is B
looks easy, but I don't understand why B
Manager
Joined: 11 Apr 2008
Posts: 128
Location: Chicago
Followers: 1

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

Re: data sufficiency [#permalink]

### Show Tags

03 Jul 2008, 09:23
Zaur wrote:
a total of 9 women and 12 men reside in the 21 apartment that are in a certain apartment building, one person to each apartment. If a pool taker is to select one of the apartments at random, what is the probability that the resident of the apartment selected will be a women who is a student?
1) of the women, 4 are student
2) of the women, 5 are not student
the answer is B
looks easy, but I don't understand why B

Answer can not be B since stmts 1) and 2) give the same information. Answer should be D (Explanation to follow).
Attachments

women_students.gif [ 12.08 KiB | Viewed 1401 times ]

_________________

Factorials were someone's attempt to make math look exciting!!!

Current Student
Joined: 18 Jun 2008
Posts: 228
Followers: 2

Kudos [?]: 58 [0], given: 3

Re: data sufficiency [#permalink]

### Show Tags

03 Jul 2008, 09:35
brokerbevo wrote:
Zaur wrote:
a total of 9 women and 12 men reside in the 21 apartment that are in a certain apartment building, one person to each apartment. If a pool taker is to select one of the apartments at random, what is the probability that the resident of the apartment selected will be a women who is a student?
1) of the women, 4 are student
2) of the women, 5 are not student
the answer is B
looks easy, but I don't understand why B

Answer can not be B since stmts 1) and 2) give the same information. Answer should be D (Explanation to follow).

I'm assuming theres some kind of typo? Otherwise it should be D as the poster above stated.

stem1 gives 4 female students out of 21
stem2 gives 4 female students (9-5=4) out of 21
Director
Status: No dream is too large, no dreamer is too small
Joined: 14 Jul 2010
Posts: 651
Followers: 42

Kudos [?]: 864 [0], given: 39

Re: data sufficiency [#permalink]

### Show Tags

10 Jan 2012, 05:50
1) 4/9 Statement 1 is sufficient
2) 9-5= 4/9 Statement 2 is also sufficient
Ans. D
_________________

Collections:-
PSof OG solved by GC members: http://gmatclub.com/forum/collection-ps-with-solution-from-gmatclub-110005.html
DS of OG solved by GC members: http://gmatclub.com/forum/collection-ds-with-solution-from-gmatclub-110004.html
100 GMAT PREP Quantitative collection http://gmatclub.com/forum/gmat-prep-problem-collections-114358.html
Collections of work/rate problems with solutions http://gmatclub.com/forum/collections-of-work-rate-problem-with-solutions-118919.html
Mixture problems in a file with best solutions: http://gmatclub.com/forum/mixture-problems-with-best-and-easy-solutions-all-together-124644.html

Re: data sufficiency   [#permalink] 10 Jan 2012, 05:50
Similar topics Replies Last post
Similar
Topics:
2 If a, b, c and d are integers, is (2^a·3^b)/(2^c·3^d) even 5 09 Jul 2016, 09:40
data sufficiency Complex 2 11 Jul 2010, 01:46
55 If x and y are positive integers, what is the value of xy? 10 14 Jun 2010, 16:50
14 Data Sufficiency (DS) Traps 19 05 Apr 2008, 02:44
Data Sufficiency Question 1 18 Jan 2009, 12:48
Display posts from previous: Sort by

# data sufficiency

 new topic post reply Question banks Downloads My Bookmarks Reviews Important topics

 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®.