In a group of 80 college students, how many own a car? (1) : GMAT Data Sufficiency (DS) - Page 2
Check GMAT Club Decision Tracker for the Latest School Decision Releases https://gmatclub.com/AppTrack

It is currently 24 Feb 2017, 12:04
GMAT Club Tests

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

In a group of 80 college students, how many own a car? (1)

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

Hide Tags

3 KUDOS received
Manager
Manager
User avatar
Joined: 22 Feb 2009
Posts: 229
Followers: 6

Kudos [?]: 138 [3] , given: 148

GMAT ToolKit User
Re: In a group of 80 college students, how many own a car? (1) [#permalink]

Show Tags

New post 01 Aug 2014, 02:35
3
This post received
KUDOS
5
This post was
BOOKMARKED
Bunuel wrote:
Hussain15 wrote:
In a group of 80 college students, how many own a car?

(1) Of the students who do not own a car, 14 are male.

(2) Of the students who own a car, 42% are female.


In a group of 80 college students, how many own a car?

(1) Of the students who do not own a car, 14 are male. Clearly insufficient.

(2) Of the students who own a car, 42% are female --> let # of students who own a car be \(x\) --> \(0.42x=\) # of females who own a car. But \(0.42x\) must be an integer, as it represent # of females. \(0.42x=integer\) --> \(\frac{21}{50}x=integer\) --> \(x\) is a multiple of 50: 50, 100, 150, ... But \(x\) (# of students who own car) must also be less than (or equal to) 80. So \(x=50\). sufficient.

Answer: B.


This is tricky. Thanks for the explanation.
_________________

.........................................................................
+1 Kudos please, if you like my post

Intern
Intern
avatar
Joined: 18 Dec 2014
Posts: 2
Followers: 0

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

Re: In a group of 80 college students, how many own a car? (1) [#permalink]

Show Tags

New post 18 Dec 2014, 23:52
very good question.i was wrong to think it is E,BUT we should be quiet familiar with the property of integer.it is a little difficult to think like that but i will be accustomed to think in this way
Intern
Intern
User avatar
Joined: 21 Apr 2014
Posts: 40
Followers: 1

Kudos [?]: 19 [0], given: 0

Re: In a group of 80 college students, how many own a car? (1) [#permalink]

Show Tags

New post 06 Mar 2015, 21:08
The fastest way to go about this is to simply determine what each point really says and if its possible to have different solutions.

For one this is definitely the case, because we can have 20 students own a car or we can have 30, we have no idea, so it is insufficient.

Two is a little bit more tricky, let's look at what it is actually saying here: of the students who own a car 42% must be female. We have to remember that, because it is people, they have to be whole numbers. 42% is equal to 21/50, which cannot be simplified any more, so we know that the number of students who own a car must be a multiple of 50. The only multiple of fifty that works with the constraint that there must be 80 people is 50 itself, therefore we know that this is sufficient.
_________________

Eliza
GMAT Tutor
bestgmatprepcourse.com

Senior Manager
Senior Manager
avatar
Joined: 02 Dec 2014
Posts: 388
Location: Russian Federation
Concentration: General Management, Economics
GMAT 1: 640 Q44 V33
WE: Sales (Telecommunications)
Followers: 0

Kudos [?]: 79 [0], given: 349

Re: In a group of 80 college students, how many own a car? (1) [#permalink]

Show Tags

New post 27 Mar 2015, 15:48
Nice question really. At first i didn't understand what about males that own a car but now i got it. let's bump this question for practice
_________________

"Are you gangsters?" - "No we are Russians!"

Manager
Manager
avatar
Joined: 07 Feb 2015
Posts: 84
Followers: 1

Kudos [?]: 13 [0], given: 28

Re: In a group of 80 college students, how many own a car? (1) [#permalink]

Show Tags

New post 26 Jul 2015, 10:58
Is it possible to solve this using the table method? I used the table method and got E because in the table it looks like there is not enough information.
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 13955
Followers: 590

Kudos [?]: 167 [0], given: 0

Premium Member
Re: In a group of 80 college students, how many own a car? (1) [#permalink]

Show Tags

New post 30 Aug 2016, 21:46
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Manager
Manager
User avatar
Joined: 19 Oct 2012
Posts: 222
Location: India
Concentration: General Management, Operations
GMAT 1: 660 Q47 V35
GPA: 3.81
WE: Information Technology (Computer Software)
Followers: 1

Kudos [?]: 15 [0], given: 32

CAT Tests
Re: In a group of 80 college students, how many own a car? (1) [#permalink]

Show Tags

New post 31 Aug 2016, 20:28
OK. This morning really killed my morning blues...Awesome question! OA B!
_________________

Citius, Altius, Fortius

Re: In a group of 80 college students, how many own a car? (1)   [#permalink] 31 Aug 2016, 20:28

Go to page   Previous    1   2   [ 27 posts ] 

    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic In a group of 42 college students, how many were juniors who landedIn Bunuel 3 30 May 2016, 12:56
4 Experts publish their posts in the topic In a random sample of 80 adults, how many are college Bunuel 9 18 Sep 2012, 02:28
3 Experts publish their posts in the topic How many of the 42 people in a group are employed students BANON 8 23 Feb 2012, 07:15
4 Experts publish their posts in the topic In a group of 80 college students, how many own a car? gmatprep2011 10 16 Apr 2011, 06:39
4 Experts publish their posts in the topic How many of the 42 people in a group are employed students? sandranjeim 4 17 Apr 2010, 04:34
Display posts from previous: Sort by

In a group of 80 college students, how many own a car? (1)

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


GMAT Club MBA Forum Home| About| 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®.