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

It is currently 23 Oct 2014, 03:12

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

Of the 200 students at College T majoring in one or more of

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Expert Post
2 KUDOS received
GMAT Pill Instructor
User avatar
Joined: 14 Apr 2009
Posts: 1611
Location: New York, NY
Followers: 294

Kudos [?]: 693 [2] , given: 6

Of the 200 students at College T majoring in one or more of [#permalink] New post 05 Oct 2012, 08:23
2
This post received
KUDOS
Expert's post
2
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

79% (02:10) correct 21% (01:39) wrong based on 14 sessions
Official Guide Venn Diagrams

Here's a question from OG13 #222, pg 184...and a few notes you should know about Venn Diagrams for the GMAT.
Image



Quote:
Q: Of the 200 students at College T majoring in one or more of the sciences, 130 are majoring in chemistry and 150 are majoring in biology.... [please purchase OG and follow along on pg184 for remaining question]

A) 20 to 50
B) 40 to 70
C) 50 to 130
D) 110 to 30
E) 110 to 150


General Outline

You'll often see venn diagrams associated with word problems that involve an overlapping
segment between two parts. In the example above, we have a group of students in one
major and a group of students in another major.

Divide the Problem

Two Circles: Each of these majors (chemistry and biology) are represented with the
two circles.


Overlapped Portion: Some people double-major - that's the overlapping shaded region.
This is the portion that belongs to both circles. In the question above, this means students
who major in both chemistry and biology.


Outside square Area: Perhaps some students do not major in either chemistry or
biology - this is represented by the portion outside of the two circles but within the box.

It is NOT necessarily equivalent to:

1 - circle1 - circle 2

You cannot simply subtract the value of each circle to find the area of this outside area.
If the circles overlap, you would be double counting the overlapping region in your
calculation. So do not fall into this trip!

Translate and Use the Hints
In the above question, you are given information that "at least 30 students are not
majoring in either chemistry or biology"---the keyword is "at least."

We don't know exactly how many students are in this "outside" area, but we know
that at least 30 of them are there. So utilize this 30 to help you find the extreme
range of how many students are double majoring.

Out of the 200 students, 30 of them are not involved with chemistry or biology.

So that must mean the remaining 170 are involved with chemistry or biology to some extent.

But comparing this 170 relevant students with the 130 chemistry majors and the 150
biology majors seems to show the numbers don't add up.


The combined 130 chem and 150 bio majors = 280 majors, which is a lot more than the
relevant students. So what exactly does this mean?

Please view the video for further explanation on how to set this problem up and
think through it. Track your OG progress here.
[Reveal] Spoiler: OA

_________________


... and more


Image What's Inside GMAT Pill?

Zeke Lee, GMAT Pill Study Method (Study Less. Score More.)


GMAT Pill Reviews | GMAT PILL Free Practice Test


Last edited by Bunuel on 05 Oct 2012, 08:26, edited 1 time in total.
Renamed the topic.
GMAT Pill GMAT Discount CodesKaplan GMAT Prep Discount CodesVeritas Prep GMAT Discount Codes
Senior Manager
Senior Manager
User avatar
Status: Prevent and prepare. Not repent and repair!!
Joined: 13 Feb 2010
Posts: 278
Location: India
Concentration: Technology, General Management
GPA: 3.75
WE: Sales (Telecommunications)
Followers: 9

Kudos [?]: 25 [0], given: 282

Re: Of the 200 students at College T majoring in one or more of [#permalink] New post 23 Dec 2012, 09:10
1
This post was
BOOKMARKED
Hi,

Here is my take.

Pls see the attached diagram.

Since it says atleast 30 it means that bio not major and chemistry not major can vary from 30 to 50.
This implies major in both can vary from 110 to 130
Attachments

sets.jpg
sets.jpg [ 32.18 KiB | Viewed 1408 times ]


_________________

I've failed over and over and over again in my life and that is why I succeed--Michael Jordan
Kudos drives a person to better himself every single time. So Pls give it generously
Wont give up till i hit a 700+

CEO
CEO
User avatar
Joined: 09 Sep 2013
Posts: 2831
Followers: 206

Kudos [?]: 42 [0], given: 0

Premium Member
Re: Of the 200 students at College T majoring in one or more of [#permalink] New post 17 Sep 2014, 08:42
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

Re: Of the 200 students at College T majoring in one or more of   [#permalink] 17 Sep 2014, 08:42
    Similar topics Author Replies Last post
Similar
Topics:
9 Experts publish their posts in the topic Of the 200 students at College T majoring in one or more of Walkabout 6 29 Dec 2012, 05:57
Of the 200 students at College T majoring in one or more of snowbirdskier 1 22 Sep 2008, 12:28
1 Of the 200 students at College T majoring in one or more of droopy57 3 26 Aug 2008, 22:46
1 Of the 200 students at college T majoring in one or more of blog 3 25 Jan 2008, 11:52
Of the 200 students at College T majoring in one or more of omomo 4 12 Oct 2005, 18:21
Display posts from previous: Sort by

Of the 200 students at College T majoring in one or more of

  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®.