Of the companies surveyed about the skills they required in : GMAT Data Sufficiency (DS)
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 18 Jan 2017, 05:01

### 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

# Of the companies surveyed about the skills they required in

Author Message
TAGS:

### Hide Tags

Intern
Joined: 26 Jul 2010
Posts: 24
Followers: 0

Kudos [?]: 132 [0], given: 8

### Show Tags

28 Nov 2010, 18:25
1
This post was
BOOKMARKED
00:00

Difficulty:

35% (medium)

Question Stats:

73% (02:10) correct 27% (01:42) wrong based on 70 sessions

### HideShow timer Statistics

Of the companies surveyed about the skills they required in prospective employees, 20 percent required both computer skills and writing skills. What percent of the companies surveyed required neither computer skills nor writing skills?

(1) Of those companies surveyed that required computer skills, half required writing skills.
(2) 45 percent of the companies surveyed required writing skills but not computer skills.
[Reveal] Spoiler: OA

Last edited by Bunuel on 03 Apr 2012, 22:45, edited 1 time in total.
Edited the question and added the OA
Director
Joined: 03 Sep 2006
Posts: 879
Followers: 6

Kudos [?]: 769 [0], given: 33

### Show Tags

28 Nov 2010, 18:49
With statement 1 you can't even know how many require computer skills and how many require writing skills. So there is no chane to find out the number which require neither of these skills.

With statement 2, we can't know the percentage which might be required to know the computer skills and as a result we can't know the percentage which requires neither.

But if we combine the statement 1 and statement2, we can find out the percentage of the employees which require neither of the skills.

Thus "C"
Manager
Joined: 13 Jul 2010
Posts: 169
Followers: 1

Kudos [?]: 72 [0], given: 7

### Show Tags

28 Nov 2010, 19:29
LM wrote:
With statement 1 you can't even know how many require computer skills and how many require writing skills. So there is no chane to find out the number which require neither of these skills. can't you determine the percentage of computer skills since half of the computer skills also required writing skills and we know the percentage that required both =20% so therefore percentage total that required computer skills was 40%?

With statement 2, we can't know the percentage which might be required to know the computer skills and as a result we can't know the percentage which requires neither.

But if we combine the statement 1 and statement2, we can find out the percentage of the employees which require neither of the skills.

Thus "C"

I used venn diagram for this and go a total of 85% that required both comp skills and writing skills or either or. so the percentage that required none is 15%.
Math Expert
Joined: 02 Sep 2009
Posts: 36540
Followers: 7074

Kudos [?]: 93075 [0], given: 10542

### Show Tags

29 Nov 2010, 00:18
pgmat wrote:
Can some one help me with this DS problem?

Of the companies surveyed about the skills they required in prospective employees, 20 percent required both computer skills and writing skills. What percent of the companies surveyed required neither computer skills nor writing skills?
(1) Of those companies surveyed that required computer skills, half required writing skills.
(2) 45 percent of the companies surveyed required writing skills but not computer skills.

Thanks.

You can draw a Venn diagram or make a matrix to solve this question.

Note that statement (1) says that "of those companies surveyed that required computer skills, half required writing skills" --> if $$y$$ required computer skills, then of those $$y$$ who required computer skills, $$\frac{y}{2}$$ also required writing skills (# of companies required computer and writing skills is $$\frac{y}{2}=20$$).
Attachment:

Skills.JPG [ 52.83 KiB | Viewed 2257 times ]

Hope it helps.
_________________
Manager
Status: I rest, I rust.
Joined: 04 Oct 2010
Posts: 122
Schools: ISB - Co 2013
WE 1: IT Professional since 2006
Followers: 17

Kudos [?]: 119 [0], given: 9

### Show Tags

29 Nov 2010, 02:35
My method too is similar:

lets say
C - Computer skills
W - writing skills
CW - both = 20% (given)
C'W' - Neither

From 1: we get CW = C/2 => C=40%
But we can not comment on W..

From2: We get W-CW = 45 => W=65
We do not get anything on C...

When we combine both C=40, W=65, CW=20
(Total %) 100 = C + W + C'W' - CW => 100 = 40 + 65 + C'W' - 20

=> C'W' = 15%

PS: If you like my post, don't hesitate to click "+1 Kudos"
_________________

Respect,
Vaibhav

PS: Correct me if I am wrong.

Veritas Prep GMAT Instructor
Joined: 16 Oct 2010
Posts: 7121
Location: Pune, India
Followers: 2132

Kudos [?]: 13636 [0], given: 222

### Show Tags

29 Nov 2010, 05:58
pgmat wrote:
Thanks. Could you please share the Venn Diagram?

There you go:
Stmnt 1: Of those who required computer skills, half required writing skills too. This means those 'half' are the ones that are common to both computer and writing. Then those who require only computer skills should also be 20%.
Attachment:

Ques2.jpg [ 9.68 KiB | Viewed 2217 times ]

Stmnt 2: 45% required only Writing skills.
Attachment:

Ques1.jpg [ 9.72 KiB | Viewed 2217 times ]

You cannot find x with either statement alone. But using both, you get x = 100% - (20 + 20 + 45)% = 15%
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Get started with Veritas Prep GMAT On Demand for \$199

Veritas Prep Reviews

Manager
Joined: 11 Jan 2011
Posts: 69
GMAT 1: 680 Q44 V39
GMAT 2: 710 Q48 V40
Followers: 0

Kudos [?]: 18 [0], given: 3

### Show Tags

03 Apr 2012, 19:40
Of the companies surveyed about the skills they required in prospective employees, 20 percent required both computer skills and writing skills. What perfect of the companies surveyed required neither computer skills nor writing skills?

1) Of those companies surveyed that required computer skills, half required writing skills.

2) 45 percent of the companies surveyed required writing skills but not computer skills.

Can someone explain their thought process through this problem? I've tried reading and re-reading the GMAT explanation but I just can't seem to understand their process.

Thanks,
Rich
Math Expert
Joined: 02 Sep 2009
Posts: 36540
Followers: 7074

Kudos [?]: 93075 [0], given: 10542

### Show Tags

03 Apr 2012, 22:48
NvrEvrGvUp wrote:
Of the companies surveyed about the skills they required in prospective employees, 20 percent required both computer skills and writing skills. What perfect of the companies surveyed required neither computer skills nor writing skills?

1) Of those companies surveyed that required computer skills, half required writing skills.

2) 45 percent of the companies surveyed required writing skills but not computer skills.

Can someone explain their thought process through this problem? I've tried reading and re-reading the GMAT explanation but I just can't seem to understand their process.

Thanks,
Rich

_________________
Manager
Joined: 11 Jan 2011
Posts: 69
GMAT 1: 680 Q44 V39
GMAT 2: 710 Q48 V40
Followers: 0

Kudos [?]: 18 [0], given: 3

Re: Of the companies surveyed about the skills they required in [#permalink]

### Show Tags

11 Apr 2012, 05:28
I still can't wrap my head around the wording of statement one.

I understand statement two but I still don't understand how to use statement one.
Math Expert
Joined: 02 Sep 2009
Posts: 36540
Followers: 7074

Kudos [?]: 93075 [0], given: 10542

Re: Of the companies surveyed about the skills they required in [#permalink]

### Show Tags

11 Apr 2012, 05:38
NvrEvrGvUp wrote:
I still can't wrap my head around the wording of statement one.

I understand statement two but I still don't understand how to use statement one.

Statement (1) says that "of those companies surveyed that required computer skills, half required writing skills" --> if $$y$$ required computer skills, then of those $$y$$ who required computer skills, $$\frac{y}{2}$$ also required writing skills (# of companies required computer and writing skills is $$\frac{y}{2}=20$$).

My post above shows how it can be represented in double-set matrix and Karishma's post shows how it can be represented in Venn diagram.

So, can you please be more specific what part is confusing for you in this statement?
_________________
GMAT Club Legend
Joined: 09 Sep 2013
Posts: 13436
Followers: 575

Kudos [?]: 163 [0], given: 0

Re: Of the companies surveyed about the skills they required in [#permalink]

### Show Tags

23 Nov 2014, 22:31
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.
_________________
Re: Of the companies surveyed about the skills they required in   [#permalink] 23 Nov 2014, 22:31
Similar topics Replies Last post
Similar
Topics:
Fifty men and fifty women responded to a survey about the current valu 2 20 Dec 2016, 00:13
5 Of the 1,000 companies responding to a certain survey, what 11 01 Feb 2014, 18:13
1 A data company recently conducted a survey to determine wh 10 08 Jun 2013, 01:11
25 Of the companies surveyed about the skills they required in 8 25 Jun 2012, 02:08
9 Of the companies surveyed about the skills they required in 6 14 Jun 2011, 02:52
Display posts from previous: Sort by