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

It is currently 28 Aug 2015, 01:50
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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

90 students represent x percent of the boys at Jones Element

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 06 Dec 2012
Posts: 1
Followers: 0

Kudos [?]: 1 [0], given: 4

90 students represent x percent of the boys at Jones Element [#permalink] New post 06 Jan 2013, 09:31
2
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

62% (02:30) correct 38% (01:50) wrong based on 72 sessions
90 students represent x percent of the boys at Jones Elementary School. If the boys at Jones Elementary make up 40% of the total school population of x students, what is x?

A. 125
B. 150
C. 225
D. 250
E. 500

[cant understand the language]
[Reveal] Spoiler: OA

Last edited by Bunuel on 07 Jan 2013, 01:46, edited 1 time in total.
Renamed the topic and edited the question.
Expert Post
Verbal Forum Moderator
Verbal Forum Moderator
User avatar
Status: Preparing for the another shot...!
Joined: 03 Feb 2011
Posts: 1422
Location: India
Concentration: Finance, Marketing
GPA: 3.75
Followers: 151

Kudos [?]: 863 [0], given: 62

GMAT ToolKit User Premium Member
Re: percent [#permalink] New post 06 Jan 2013, 09:39
Expert's post
vidyavatigore wrote:
90 students represent x percent of the boys at Jones Elementary School. If the boys at Jones Elementary make up 40% of the total school population of x students, what is x?

[cant understand the language]

125

150

225

250

500


\(90=x/100 * # boys\)
#boys=\(0.4x\)
\(90=x/100 * 0.4x\).
\(9000=0.4* x^2\)
\(22500=x^2\)
\(x=150\)
answer=150.
_________________

Prepositional Phrases Clarified|Elimination of BEING| Absolute Phrases Clarified
Rules For Posting
www.Univ-Scholarships.com

Expert Post
1 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 29097
Followers: 4720

Kudos [?]: 49605 [1] , given: 7400

Re: 90 students represent x percent of the boys at Jones Element [#permalink] New post 07 Jan 2013, 01:56
1
This post received
KUDOS
Expert's post
1
This post was
BOOKMARKED
vidyavatigore wrote:
90 students represent x percent of the boys at Jones Elementary School. If the boys at Jones Elementary make up 40% of the total school population of x students, what is x?

A. 125
B. 150
C. 225
D. 250
E. 500

[cant understand the language]


Step by step:
90 students represent x percent of the boys at Jones Elementary School: \(90=\frac{x}{100}*boys\) --> \(boys=\frac{9000}{x}\);

The boys at Jones Elementary make up 40% of the total school population of x students: \(boys=0.4x\) --> \(\frac{9000}{x}=0.4x\) --> \(x=150\).

Answer: B.

To elaborate: there are total of 150 students at the school and 0.4*150=60 of them are boys. 150% of 60 boys is 90.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis ; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) ; 12. Tricky questions from previous years.

COLLECTION OF QUESTIONS:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS ; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
25 extra-hard Quant Tests

GMAT Club Premium Membership - big benefits and savings

GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 6083
Followers: 340

Kudos [?]: 68 [0], given: 0

Premium Member
Re: 90 students represent x percent of the boys at Jones Element [#permalink] New post 28 Nov 2014, 11:41
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: 90 students represent x percent of the boys at Jones Element   [#permalink] 28 Nov 2014, 11:41
    Similar topics Author Replies Last post
Similar
Topics:
10 Experts publish their posts in the topic The number of students enrolled at school X this year is 7 percent Bunuel 5 12 Nov 2014, 08:54
5 Experts publish their posts in the topic Of the students at a certain high school, 90 percent took a ritumaheshwari02 5 02 Dec 2012, 05:53
7 Experts publish their posts in the topic If 40 percent of all students at college X have brown hair a AnkitK 12 09 Mar 2011, 22:09
2 Experts publish their posts in the topic There are 40 students in a classroom, 9/20 of them are boys apurva1985 10 22 Jun 2009, 10:04
6 Experts publish their posts in the topic 90 students represent x percent of the boys at Jones Piter 5 26 Aug 2007, 10:07
Display posts from previous: Sort by

90 students represent x percent of the boys at Jones Element

  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®.