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

It is currently 24 Oct 2014, 16:21

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

Overlapping sets

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
1 KUDOS received
Manager
Manager
avatar
Joined: 16 May 2011
Posts: 205
Concentration: Finance, Real Estate
GMAT Date: 12-27-2011
WE: Law (Law)
Followers: 1

Kudos [?]: 30 [1] , given: 37

GMAT ToolKit User
Overlapping sets [#permalink] New post 13 Jun 2011, 03:47
1
This post received
KUDOS
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

90% (03:08) correct 10% (00:00) wrong based on 10 sessions
in a certain city 80% of the houses have cables and 60% have VCR. what is the range of houses that have both cables and a VCR, if there are 150,000 houses:(IN THOUSENDS)

1. 30-60
2. 30-90
3. 60-90
4. 60-150
5. 90-150

I used a table solving for NO CABLES/NO VCR=0 and then VCR/NO CABLES=0 to recieve the anser which seems correct.

is som1 can suggest a quicker method?

kind regards
[Reveal] Spoiler: OA
SVP
SVP
avatar
Joined: 16 Nov 2010
Posts: 1691
Location: United States (IN)
Concentration: Strategy, Technology
Followers: 31

Kudos [?]: 299 [0], given: 36

Premium Member Reviews Badge
Re: Overlapping sets [#permalink] New post 13 Jun 2011, 03:58
The highest range can be the # of people who have both Cables and VCR, which means 60% of people have cables, and VCR too.

So 60% of people = 60/100 * 150000 = 90000

Then again, the least overlap can be like :

80% + 60% - 100% = 40%

40% of 150000 = 40/100 * 150000 = 60000

So the range = 60000 - 90000

So Answer - C
Attachments

Sets.png
Sets.png [ 12.76 KiB | Viewed 970 times ]


_________________

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Current Student
avatar
Joined: 26 May 2005
Posts: 570
Followers: 18

Kudos [?]: 116 [0], given: 13

Re: Overlapping sets [#permalink] New post 13 Jun 2011, 04:20
dimri10 wrote:
in a certain city 80% of the houses have cables and 60% have VCR. what is the range of houses that have both cables and a VCR, if there are 150,000 houses:(IN THOUSENDS)

1. 30-60
2. 30-90
3. 60-90
4. 60-150
5. 90-150

I used a table solving for NO CABLES/NO VCR=0 and then VCR/NO CABLES=0 to recieve the anser which seems correct.

is som1 can suggest a quicker method?

kind regards


The range is 40% - 60% hence
60k - 90K
Attachments

Set.jpg
Set.jpg [ 22.51 KiB | Viewed 962 times ]

Manager
Manager
avatar
Joined: 16 May 2011
Posts: 205
Concentration: Finance, Real Estate
GMAT Date: 12-27-2011
WE: Law (Law)
Followers: 1

Kudos [?]: 30 [0], given: 37

GMAT ToolKit User
Re: Overlapping sets [#permalink] New post 13 Jun 2011, 04:33
subhashghosh wrote:
The highest range can be the # of people who have both Cables and VCR, which means 60% of people have cables, and VCR too.

So 60% of people = 60/100 * 150000 = 90000

Then again, the least overlap can be like :

80% + 60% - 100% = 40%

40% of 150000 = 40/100 * 150000 = 60000

So the range = 60000 - 90000

So Answer - C



thank's great reply.
but in the same subject:

is there a way to deal with sets without Venn diagrams?
1 KUDOS received
SVP
SVP
avatar
Joined: 16 Nov 2010
Posts: 1691
Location: United States (IN)
Concentration: Strategy, Technology
Followers: 31

Kudos [?]: 299 [1] , given: 36

Premium Member Reviews Badge
Re: Overlapping sets [#permalink] New post 13 Jun 2011, 04:37
1
This post received
KUDOS
Well, to my mind, Venn diagrams make visualization easier. I think Venn diagrams are great, you can try the how to draw Venn diagrams by Whiplash, I think it's really good stuff.

Sometimes, double matrix is also good, especially for 2 sets, but it's really based on individual comfort level.
_________________

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Manager
Manager
avatar
Joined: 16 May 2011
Posts: 205
Concentration: Finance, Real Estate
GMAT Date: 12-27-2011
WE: Law (Law)
Followers: 1

Kudos [?]: 30 [0], given: 37

GMAT ToolKit User
Re: Overlapping sets [#permalink] New post 13 Jun 2011, 05:14
well i tried whiplash's way. it's too long in comparison to:

150=58+88+53-both-2*all.
VP
VP
avatar
Status: There is always something new !!
Affiliations: PMI,QAI Global,eXampleCG
Joined: 08 May 2009
Posts: 1364
Followers: 12

Kudos [?]: 144 [0], given: 10

Re: Overlapping sets [#permalink] New post 13 Jun 2011, 22:04
40 - 60% giving 60-90.
_________________

Visit -- http://www.sustainable-sphere.com/
Promote Green Business,Sustainable Living and Green Earth !!

Re: Overlapping sets   [#permalink] 13 Jun 2011, 22:04
    Similar topics Author Replies Last post
Similar
Topics:
5 overlapping sets ramana 7 21 Jul 2010, 01:43
Experts publish their posts in the topic Overlapping Sets Hussain15 7 15 Jul 2010, 23:45
overlapping sets indolent 3 10 Mar 2010, 04:28
overlapping sets thailandvc 7 19 Sep 2009, 21:28
Overlapping Sets MatiasMM 1 11 Sep 2009, 14:25
Display posts from previous: Sort by

Overlapping sets

  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®.