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

 It is currently 07 Mar 2014, 22:40

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

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

Author Message
TAGS:
Intern
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]  20 Sep 2010, 18:40
00:00

Difficulty:

15% (low)

Question Stats:

92% (02:21) correct 7% (01:58) wrong based on 28 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
Retired Moderator
Joined: 02 Sep 2010
Posts: 807
Location: London
Followers: 74

Kudos [?]: 385 [1] , given: 25

Re: Ratio PS Manager Production line worker [#permalink]  20 Sep 2010, 18:44
1
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

_________________

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

My GMAT story

Math Expert
Joined: 02 Sep 2009
Posts: 16782
Followers: 2770

Kudos [?]: 17566 [1] , given: 2183

Re: Ratio PS Manager Production line worker [#permalink]  20 Sep 2010, 20:30
1
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.

_________________
Intern
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]  21 Sep 2010, 05:08
Intern
Joined: 05 Jan 2012
Posts: 1
Concentration: Finance, Accounting
GMAT Date: 05-15-2012
GPA: 3.53
WE: Accounting (Manufacturing)
Followers: 0

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

company [#permalink]  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
Status: MBA Aspirant
Joined: 12 Jun 2010
Posts: 180
Location: India
WE: Information Technology (Investment Banking)
Followers: 3

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

Re: In a acertain company, the ratio of the numer of manager to [#permalink]  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 Replies Last post
Similar
Topics:
In a certain company, the ratio of the number of managers to 1 19 Nov 2005, 23:46
In Company X, the ratio of upper-management to 3 24 Sep 2006, 11:40
In a certain company, the ratio of managers to production 2 12 Jul 2007, 11:21
In a certain company, the ratio of the number of managers to 3 14 Aug 2008, 21:11
The ratio of a numerator to denominator is 2:3. If six is 1 23 Mar 2013, 13:59
Display posts from previous: Sort by