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

 It is currently 28 Mar 2015, 14:15

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

Half of the company's employees work in manufacturing. 20%

Author Message
TAGS:
Current Student
Joined: 11 May 2008
Posts: 561
Followers: 7

Kudos [?]: 52 [0], given: 0

Half of the company's employees work in manufacturing. 20% [#permalink]  30 Aug 2008, 02:59
00:00

Difficulty:

(N/A)

Question Stats:

100% (02:55) correct 0% (00:00) wrong based on 4 sessions
Half of the company's employees work in manufacturing. 20% of the employees who do not work in manufacturing are women. What percent of the company's employees are men?

1. 50% of the company's male employees work in manufacturing
2. 20% of the company's employees who work in manufacturing are women
Intern
Joined: 16 Feb 2006
Posts: 30
Location: ZURICH
Followers: 0

Kudos [?]: 6 [0], given: 3

Re: HOW MANY EMPLOYEES? [#permalink]  30 Aug 2008, 08:47
Company employees = E
No. of working in manufacturing = 0.5E

Let no. of males are M and females are F.
therefore M+F = E

Female working manufacturing = F1
Female not working manufacturing= F2 = 0.2 x 0.5E = 0.1E
therefore F1 + F2 = F = F1 + 0.1E

Male working manufacturing = M1
Male not working manufacturing = M2 = 0.4E
therefore M1+M2=M=M1+0.4E

Statement 1. 50% of the company's male employees work in manufacturing
implies M1 = 0.5M
0.5M + M2 = M
= M2 = 0.5M = 0.4E
therefore M = 0.8E
80% of total company employees are male

Statement 2. 20% of the company's employees who work in manufacturing are women
F1 = 0.2E
F = 0.2E + 0.1E
= 0.3E
therefore no. of males = 0.7E
70% of total company employees are male .

option D
_________________

TRY N TRY UNTIL U SUCCEED

Manager
Joined: 12 May 2009
Posts: 54
Followers: 2

Kudos [?]: 57 [0], given: 18

Re: HOW MANY EMPLOYEES? [#permalink]  29 Nov 2009, 14:52
Quote:
80% of total company employees are male

Quote:
70% of total company employees are male .

How is it possible that we get two different percentages from the statements?
Math Expert
Joined: 02 Sep 2009
Posts: 26557
Followers: 4070

Kudos [?]: 38530 [1] , given: 4963

Re: HOW MANY EMPLOYEES? [#permalink]  29 Nov 2009, 16:06
1
KUDOS
Expert's post
enfinity wrote:
Quote:
80% of total company employees are male

Quote:
70% of total company employees are male .

How is it possible that we get two different percentages from the statements?

In DS two statements never contradict.

The problem is that for statement 2 solutions is not right.

Stem: consider total # of employees to be 100. We know that 50 are in manufacturing and 50 are not in manufacturing. From the 50 which are not in manufacturing, 40 are men.

(2) 20% of the company's employees who work in manufacturing are women. --> 40 (80%*50=40) are men in manufacturing. So total men 40+40=80, which is 80% of 100.

Hope its help.
_________________
Manager
Joined: 12 May 2009
Posts: 54
Followers: 2

Kudos [?]: 57 [0], given: 18

Re: HOW MANY EMPLOYEES? [#permalink]  29 Nov 2009, 16:24
got it! good example. I misread the following part:

20% of the company's employees who work in manufacturing are women

Lesson Learned: Read the question properly and you save yourself a lot of frustration

Also, I'm using a double set matrix for this kind of problems for quite some time... that really increased my accuracy and timing on set problems... so if someone has trouble with this kind of problems, look into this concept!
Manager
Joined: 22 Jul 2008
Posts: 95
Location: Bangalore,Karnataka
Followers: 3

Kudos [?]: 73 [0], given: 11

Re: HOW MANY EMPLOYEES? [#permalink]  30 Nov 2009, 05:55
even i got D
Re: HOW MANY EMPLOYEES?   [#permalink] 30 Nov 2009, 05:55
Display posts from previous: Sort by