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

It is currently 26 Jul 2014, 07:16

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

In a acertain company, the ratio of the numer of manager to

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 26 May 2010
Posts: 34
Location: International
Schools: Stern, Chicago, Duke, UNC, Wharton
WE 1: S&T
WE 2: Project Management
WE 3: Banking
Followers: 1

Kudos [?]: 6 [0], given: 35

In a acertain company, the ratio of the numer of manager to [#permalink] New post 20 Sep 2010, 18:40
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

93% (02:15) correct 7% (01:18) wrong based on 42 sessions
In a acertain company, the ratio of the numer of manager to the number of production-line workers is 5 to 72. If 8 additional Production-line workers were to be hired, the ratio of the number of managers to the number of production-line workers would be 5 to 74. How many managers does the company have?

A. 5
B. 10
C. 15
D. 20
E. 25
[Reveal] Spoiler: OA
1 KUDOS received
Retired Moderator
User avatar
Joined: 02 Sep 2010
Posts: 807
Location: London
Followers: 77

Kudos [?]: 446 [1] , given: 25

GMAT ToolKit User GMAT Tests User Reviews Badge
Re: Ratio PS Manager Production line worker [#permalink] New post 20 Sep 2010, 18:44
1
This post received
KUDOS
Gacarva wrote:
In a acertain company, the ratio of the numer of manager to the number of production-line workers is 5 to 72. If 8 additional Production-line workers were to be hired, the ratio of the number of managers to the number of production-line workers would be 5 to 74. How many managers does the company have?

A. 5
B. 10
C. 15
D. 20
E. 25


Let there be x managers. Then the number of workers is 72/5 * x
With extra workers the ratio becomes 5 to 74, therefore :

\frac{(72/5)x + 8}{x}=\frac{74}{5}

72x + 40 = 74x

x = 20

Answer is (d)
_________________

Math write-ups
1) Algebra-101 2) Sequences 3) Set combinatorics 4) 3-D geometry

My GMAT story

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Expert Post
1 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 18741
Followers: 3250

Kudos [?]: 22445 [1] , given: 2619

Re: Ratio PS Manager Production line worker [#permalink] New post 20 Sep 2010, 20:30
1
This post received
KUDOS
Expert's post
Gacarva wrote:
In a acertain company, the ratio of the numer of manager to the number of production-line workers is 5 to 72. If 8 additional Production-line workers were to be hired, the ratio of the number of managers to the number of production-line workers would be 5 to 74. How many managers does the company have?

A. 5
B. 10
C. 15
D. 20
E. 25


You can solve this problem the way discussed above or try the following:

Given: \frac{m}{w}=\frac{5x}{72x}, now 8 workers were hired and new ratio became \frac{m}{w+8}=\frac{5x}{74x}=\frac{5x}{72x+2x}, notice that nominator didn't change, so increase by 2 parts in denominator corresponds to increase by 8 workers (2 parts correspond to 8 workers = 4 times or in another words 2x=8 --> x=4), so 5 parts in nominator correspond to 5*4=20 managers.

Answer: D.
_________________

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

PLEASE READ AND FOLLOW: 11 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 NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

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

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Intern
Intern
avatar
Joined: 26 May 2010
Posts: 34
Location: International
Schools: Stern, Chicago, Duke, UNC, Wharton
WE 1: S&T
WE 2: Project Management
WE 3: Banking
Followers: 1

Kudos [?]: 6 [0], given: 35

Re: Ratio PS Manager Production line worker [#permalink] New post 21 Sep 2010, 05:08
Thank you all, I will work on problems like this one and follow your advice.
Intern
Intern
avatar
Joined: 05 Jan 2012
Posts: 1
Location: Bangladesh
Concentration: Finance, Accounting
GMAT Date: 05-15-2012
GPA: 3.53
WE: Accounting (Manufacturing)
Followers: 0

Kudos [?]: 5 [0], given: 0

company [#permalink] New post 05 Feb 2012, 00:24
let manager=m , and worker =w
m/w=5/72
=5w=72m.....1
m/w+8=5/74
5w+40=74m...........2
by solving the equations.....we find m=20
so ans is D
Manager
Manager
avatar
Status: MBA Aspirant
Joined: 12 Jun 2010
Posts: 178
Location: India
Concentration: Finance, International Business
WE: Information Technology (Investment Banking)
Followers: 3

Kudos [?]: 17 [0], given: 1

GMAT Tests User
Re: In a acertain company, the ratio of the numer of manager to [#permalink] New post 05 Feb 2012, 02:22
Ans is D
m/w = 5/72 and m/w+8 = 5/74
where m is no of managers and w is the no of production workers. On solving we get the answer as m=20
Re: In a acertain company, the ratio of the numer of manager to   [#permalink] 05 Feb 2012, 02:22
    Similar topics Author Replies Last post
Similar
Topics:
Experts publish their posts in the topic The ratio of a numerator to denominator is 2:3. If six is chiccufrazer1 1 23 Mar 2013, 13:59
In a certain company, the ratio of the number of managers to droopy57 3 14 Aug 2008, 21:11
In a certain company, the ratio of managers to production joselord 2 12 Jul 2007, 11:21
In Company X, the ratio of upper-management to X & Y 3 24 Sep 2006, 11:40
In a certain company, the ratio of the number of managers to Puilunchristin 1 19 Nov 2005, 23:46
Display posts from previous: Sort by

In a acertain company, the ratio of the numer of manager to

  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®.