It is currently 19 Oct 2017, 10:01

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

In a survey of retailers, what percent had purchased

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41893

Kudos [?]: 128873 [0], given: 12183

In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 14 Jun 2012, 03:17
Expert's post
25
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

64% (01:06) correct 36% (01:07) wrong based on 1157 sessions

HideShow timer Statistics

In a survey of retailers, what percent had purchased computers for business purposes?

(1) 85 percent of the retailers surveyed who owned their own store had purchased computers for business purposes.
(2) 40 percent of the retailers surveyed owned their own store.

Diagnostic Test
Question: 29
Page: 25
Difficulty: 650
[Reveal] Spoiler: OA

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | 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?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 128873 [0], given: 12183

Expert Post
3 KUDOS received
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41893

Kudos [?]: 128873 [3], given: 12183

In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 14 Jun 2012, 03:17
3
This post received
KUDOS
Expert's post
5
This post was
BOOKMARKED
SOLUTION

In a survey of retailers, what percent had purchased computers for business purposes?

Say there are total of 100 retailers.

(1) 85 percent of the retailers surveyed who owned their own store had purchased computers for business purposes. Clearly insufficient, since we don't know how many retailers own their store and also how many retailers who do NOT own a store had purchased computers for business purposes. Not sufficient.

(2) 40 percent of the retailers surveyed owned their own store. Clearly insufficient.

(1)+(2) From (2) we can answer the first question, we had in (1) but not the second question: we still don't know how many retailers who do NOT own a store had purchased computers for business purposes. Not sufficient.

To elaborate more consider the diagram below:
Image

As you can see we can not find the value of X from the info provided.

Answer: E.

[Reveal] Spoiler:
Attachment:
Retailers.png
Retailers.png [ 8.47 KiB | Viewed 177 times ]

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | 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?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 128873 [3], given: 12183

3 KUDOS received
Kellogg MMM ThreadMaster
User avatar
B
Joined: 29 Mar 2012
Posts: 322

Kudos [?]: 514 [3], given: 23

Location: India
GMAT 1: 640 Q50 V26
GMAT 2: 660 Q50 V28
GMAT 3: 730 Q50 V38
GMAT ToolKit User
Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 14 Jun 2012, 05:41
3
This post received
KUDOS
Quote:
In a survey of retailers, what percent had purchased computers for business purposes?

(1) 85 percent of the retailers surveyed who owned their own store had purchased computers for business purposes.
(2) 40 percent of the retailers surveyed owned their own store.
Hi,

From (1),
85% of the retailers surveyed who owned their own store had purchased computers for business purposes.

From (2)
40% of the retailers surveyed owned their own store.

Using both (1) & (2),
People who owned their own store had purchased computers for business purposes = 0.4*0.85 = 0.34
but this fraction is from those who own store. No information is given about the people who don't own the store.

Thus, Answer is (E).

It could be better explained using the diagram: (x is a variable & I think you could get the meaning of grey area, :wink: )
Attachments

Comp.jpg
Comp.jpg [ 14.62 KiB | Viewed 17359 times ]


Last edited by cyberjadugar on 09 Jul 2012, 01:03, edited 1 time in total.

Kudos [?]: 514 [3], given: 23

1 KUDOS received
Manager
Manager
avatar
Joined: 02 Jun 2011
Posts: 150

Kudos [?]: 104 [1], given: 11

Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 14 Jun 2012, 07:51
1
This post received
KUDOS
cyberjadugar wrote:
Hi,

From (1),
85% of the retailers surveyed who owned their own store had purchased computers for business purposes.

From (2)
40% of the retailers surveyed owned their own store.

Using both (1) & (2),
People who owned their own store had purchased computers for business purposes = 0.4*0.85 = 0.34
but this fraction is from those who own store. No information is given about the people who don't own the store.

Thus, Answer is (E).

It could be better explained using the diagram: (x is a variable & I think you could get the meaning of grey area, :wink: )

Dear cyberjadugar,
cud u pls explain why are we considering who own stores and who do not. the question is not asking for it.
it seems i am not getting an imp point.

Kudos [?]: 104 [1], given: 11

1 KUDOS received
Manager
Manager
User avatar
Joined: 07 Sep 2011
Posts: 63

Kudos [?]: 40 [1], given: 3

Location: United States
Concentration: Strategy, International Business
GMAT 1: 640 Q39 V38
WE: General Management (Real Estate)
Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 16 Jun 2012, 05:03
1
This post received
KUDOS
Difficulty level: 650 only because of language

Important: Need to calculate the percentage of people who bought computers for business purpose.

Stmt 1: 85% of retailers surveyed who owned their own store had purchased computers for business purpose: There is possibility of retailers didnt owning a store still have bought computer for business purpose. Insufficient.

Stmt 2: 40% of the retailers surveyed owned their own store: This allows us to calculate the percentage of retailers who owned their own store and who didnt own their own store but we do not know how many of them purchased computers for business purpose. Insufficient.

Together: We know the percentage of retailers who owned store and also bought computer for business purpose but we can not calculate the percentage of people who didnt own store but still bought computer for business purpose. Both together insufficient.


Catch is in the last portion which makes this question difficult to answer under pressure.

Answer E

Kudos [?]: 40 [1], given: 3

Expert Post
1 KUDOS received
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41893

Kudos [?]: 128873 [1], given: 12183

Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 22 Jun 2012, 04:25
1
This post received
KUDOS
Expert's post
SOLUTION

In a survey of retailers, what percent had purchased computers for business purposes?

Say there are total of 100 retailers.

(1) 85 percent of the retailers surveyed who owned their own store had purchased computers for business purposes. Clearly insufficient, since we don't know how many retailers own their store and also how many retailers who do NOT own a store had purchased computers for business purposes. Not sufficient.

(2) 40 percent of the retailers surveyed owned their own store. Clearly insufficient.

(1)+(2) From (2) we can answer the first question, we had in (1) but not the second question: we still don't know how many retailers who do NOT own a store had purchased computers for business purposes. Not sufficient.

To elaborate more consider the diagram below:
Attachment:
Retailers.png
Retailers.png [ 8.47 KiB | Viewed 18383 times ]
As you can see we can not find the value of X from the info provided.

Answer: E.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | 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?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 128873 [1], given: 12183

1 KUDOS received
Moderator
Moderator
User avatar
G
Joined: 01 Sep 2010
Posts: 3357

Kudos [?]: 9051 [1], given: 1154

Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 22 Jun 2012, 06:05
1
This post received
KUDOS
This question in my opinion is more or less 600.

using only logic we obtain E.

1) 80 % of what number 10 retailer or 1 million ?'

2) 40% of the retailers surveyed owned their own store.

1) + 2) here we have only % of what real number to manipulate ?? Not enough...............
_________________

COLLECTION OF QUESTIONS AND RESOURCES
Quant: 1. ALL GMATPrep questions Quant/Verbal 2. Bunuel Signature Collection - The Next Generation 3. Bunuel Signature Collection ALL-IN-ONE WITH SOLUTIONS 4. Veritas Prep Blog PDF Version 5. MGMAT Study Hall Thursdays with Ron Quant Videos
Verbal:1. Verbal question bank and directories by Carcass 2. MGMAT Study Hall Thursdays with Ron Verbal Videos 3. Critical Reasoning_Oldy but goldy question banks 4. Sentence Correction_Oldy but goldy question banks 5. Reading-comprehension_Oldy but goldy question banks

Kudos [?]: 9051 [1], given: 1154

Kellogg MMM ThreadMaster
User avatar
B
Joined: 29 Mar 2012
Posts: 322

Kudos [?]: 514 [0], given: 23

Location: India
GMAT 1: 640 Q50 V26
GMAT 2: 660 Q50 V28
GMAT 3: 730 Q50 V38
GMAT ToolKit User
Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 14 Jun 2012, 08:06
kashishh wrote:
Dear cyberjadugar,
cud u pls explain why are we considering who own stores and who do not. the question is not asking for it.
it seems i am not getting an imp point.

Hi,

The question is asking what percent had purchased computers for business purposes?

and on solving we get,
People who owned their own store had purchased computers for business purposes = 0.4*0.85 = 0.34 or 34%

I can't surely say that there are no more people other than those who own stores, and this is perhaps questionable!

Regards,

Kudos [?]: 514 [0], given: 23

Kellogg MMM ThreadMaster
User avatar
B
Joined: 29 Mar 2012
Posts: 322

Kudos [?]: 514 [0], given: 23

Location: India
GMAT 1: 640 Q50 V26
GMAT 2: 660 Q50 V28
GMAT 3: 730 Q50 V38
GMAT ToolKit User
Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 18 Jun 2012, 09:26
sanjoo wrote:
y is it seems like it is A..

BUT i THINK m WRONG...

bunuel ...can u explain it..

Hi,

The question asks about the percent of those who had purchased computers for business purposes out of all retailers.

While, what is given in the option (A) is the subset (those who own store had purchased computers) of all the surveyed retailer and there is no info about the other retailers who do not own any store (they might have purchased computer for business purposes).

Thus, the information given in the statements is insufficient.

Regards,

Kudos [?]: 514 [0], given: 23

Senior Manager
Senior Manager
User avatar
Affiliations: UWC
Joined: 09 May 2012
Posts: 393

Kudos [?]: 1615 [0], given: 100

Location: Canada
GMAT 1: 620 Q42 V33
GMAT 2: 680 Q44 V38
GPA: 3.43
WE: Engineering (Entertainment and Sports)
Reviews Badge
Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 18 Jun 2012, 09:53
Here's another way of doing this:

Attachment:
Capture.JPG
Capture.JPG [ 31.58 KiB | Viewed 17058 times ]


N is the total number of survey participants including those who own their own stores and those who do not.
Both statements together are insufficient because we are not given any information on how many store owners who took part in the survey and who do not own their store purchased computers. Statement 2 states that 40 percent of the retailers surveyed owned their own store; therefore logically the other 60 percent consists of retailers who do not own their own store.

I usually prefer doing overlapping sets type questions using tables a la MGMAT style. Others may find this approach helpful as well.

Kudos [?]: 1615 [0], given: 100

Director
Director
avatar
Joined: 03 Aug 2012
Posts: 899

Kudos [?]: 886 [0], given: 322

Concentration: General Management, General Management
GMAT 1: 630 Q47 V29
GMAT 2: 680 Q50 V32
GPA: 3.7
WE: Information Technology (Investment Banking)
Premium Member
Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 23 Mar 2013, 10:43
Somehow I am not getting to the solution of this one

The question says "what percent had purchased
computers for business purposes?"

=> What percent OF TOTAL purchased computer for BUSINESS PURPOSES?

As calculated by BUNUEL, the answer is 34% .

So, isn't (C) should be the answer.

Plz Advice

Rgds,
TGC
_________________

Rgds,
TGC!
_____________________________________________________________________
I Assisted You => KUDOS Please
_____________________________________________________________________________

Kudos [?]: 886 [0], given: 322

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41893

Kudos [?]: 128873 [0], given: 12183

Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 24 Mar 2013, 03:49
targetgmatchotu wrote:
Somehow I am not getting to the solution of this one

The question says "what percent had purchased
computers for business purposes?"

=> What percent OF TOTAL purchased computer for BUSINESS PURPOSES?

As calculated by BUNUEL, the answer is 34% .

So, isn't (C) should be the answer.

Plz Advice

Rgds,
TGC


We need to find what percent had purchased computers for business purposes, which is yellow box here: in-a-survey-of-retailers-what-percent-had-purchased-134506.html#p1098581 and it cannot be found.

34% is % of the retailers who owned their own store and purchased computers for business purposes.

Hope it helps.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | 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?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 128873 [0], given: 12183

Director
Director
avatar
Joined: 03 Aug 2012
Posts: 899

Kudos [?]: 886 [0], given: 322

Concentration: General Management, General Management
GMAT 1: 630 Q47 V29
GMAT 2: 680 Q50 V32
GPA: 3.7
WE: Information Technology (Investment Banking)
Premium Member
Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 24 Mar 2013, 08:58
Bunuel wrote:
targetgmatchotu wrote:
Somehow I am not getting to the solution of this one

The question says "what percent had purchased
computers for business purposes?"

=> What percent OF TOTAL purchased computer for BUSINESS PURPOSES?

As calculated by BUNUEL, the answer is 34% .

So, isn't (C) should be the answer.

Plz Advice

Rgds,
TGC


We need to find what percent had purchased computers for business purposes, which is yellow box here: in-a-survey-of-retailers-what-percent-had-purchased-134506.html#p1098581 and it cannot be found.

34% is % of the retailers who owned their own store and purchased computers for business purposes.

Hope it helps.



I might be wrong 100%,but still it is unclear to me

what percent had purchased computers for business purposes?

Here percent should be of TOTAL and NOT YELLOW

Plz Advice

Rgds,
TGC
_________________

Rgds,
TGC!
_____________________________________________________________________
I Assisted You => KUDOS Please
_____________________________________________________________________________

Kudos [?]: 886 [0], given: 322

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41893

Kudos [?]: 128873 [0], given: 12183

Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 25 Mar 2013, 05:02
targetgmatchotu wrote:
Bunuel wrote:
targetgmatchotu wrote:
Somehow I am not getting to the solution of this one

The question says "what percent had purchased
computers for business purposes?"

=> What percent OF TOTAL purchased computer for BUSINESS PURPOSES?

As calculated by BUNUEL, the answer is 34% .

So, isn't (C) should be the answer.

Plz Advice

Rgds,
TGC


We need to find what percent had purchased computers for business purposes, which is yellow box here: in-a-survey-of-retailers-what-percent-had-purchased-134506.html#p1098581 and it cannot be found.

34% is % of the retailers who owned their own store and purchased computers for business purposes.

Hope it helps.



I might be wrong 100%,but still it is unclear to me

what percent had purchased computers for business purposes?

Here percent should be of TOTAL and NOT YELLOW

Plz Advice

Rgds,
TGC


Yellow box IS total for computers purchased for business purposes.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | 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?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 128873 [0], given: 12183

Manager
Manager
User avatar
Joined: 12 Jan 2013
Posts: 218

Kudos [?]: 79 [0], given: 47

GMAT ToolKit User
Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 17 Dec 2013, 10:46
Bunuel wrote:
In a survey of retailers, what percent had purchased computers for business purposes?

(1) 85 percent of the retailers surveyed who owned their own store had purchased computers for business purposes.
(2) 40 percent of the retailers surveyed owned their own store.

Diagnostic Test
Question: 29
Page: 25
Difficulty: 650


Stm 1 only tells us stuff about people who own stores
stm 2 tells us how many in total are of the group in stmn1

we know nothing about those who do not own their own store and the question asks for traits of the total sample. So clearly E.

Kudos [?]: 79 [0], given: 47

Intern
Intern
User avatar
Joined: 22 Nov 2012
Posts: 22

Kudos [?]: 7 [0], given: 90

Location: United States
GMAT ToolKit User
Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 24 Mar 2015, 10:49
Bunuel

In this question, why can't we derive the total of computer for biz purpose as follow:

If 40%x is number of retailers owning a store, then 60%x is number of retailers not owing a shop. Also, if 85%of 40%x is number of retailers owing a store and using computer for biz purpose, then 15%(given from 100%-85%)of 60%x is number of retailers not owing a store but using computer for biz purpose.

So 1)+2) 85/100*40/100*x+15/100*60/100*x= tot of retailers using computers for biz purpose. To me seems legit C.

Please, let me know why I'm wrong.
_________________

GMAT,
It is not finished untill I win!!!

Kudos [?]: 7 [0], given: 90

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41893

Kudos [?]: 128873 [0], given: 12183

Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 24 Mar 2015, 12:17
elisabettaportioli wrote:
Bunuel

In this question, why can't we derive the total of computer for biz purpose as follow:

If 40%x is number of retailers owning a store, then 60%x is number of retailers not owing a shop. Also, if 85%of 40%x is number of retailers owing a store and using computer for biz purpose, then 15%(given from 100%-85%)of 60%x is number of retailers not owing a store but using computer for biz purpose.

So 1)+2) 85/100*40/100*x+15/100*60/100*x= tot of retailers using computers for biz purpose. To me seems legit C.

Please, let me know why I'm wrong.


The red part should be as follows: 15% of the retailers surveyed who owned their own store had NOT purchased computers for business purposes.
Please check the matrix below.
Image
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | 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?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 128873 [0], given: 12183

Senior Manager
Senior Manager
User avatar
S
Status: Professional GMAT Tutor
Affiliations: AB, cum laude, Harvard University (Class of '02)
Joined: 10 Jul 2015
Posts: 404

Kudos [?]: 478 [0], given: 53

Location: United States (CA)
Age: 37
GMAT 1: 770 Q47 V48
GMAT 2: 730 Q44 V47
GMAT 3: 750 Q50 V42
GRE 1: 337 Q168 V169
WE: Education (Education)
Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 27 Mar 2016, 19:42
Here is a visual that should help.
Attachments

Screen Shot 2016-03-27 at 7.42.00 PM.png
Screen Shot 2016-03-27 at 7.42.00 PM.png [ 67.88 KiB | Viewed 606 times ]


_________________

Harvard grad and 770 GMAT scorer, offering high-quality private GMAT tutoring, both in-person and via Skype, since 2002.

McElroy Tutoring

Kudos [?]: 478 [0], given: 53

Manager
Manager
User avatar
S
Joined: 23 Jan 2016
Posts: 201

Kudos [?]: 21 [0], given: 508

Location: India
GMAT 1: 600 Q43 V31
GMAT 2: 710 Q48 V40
GPA: 3.2
GMAT ToolKit User Premium Member
Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 08 Apr 2016, 06:45
Hi Bunuel,

How long should a question like this take to answer? I a atleast consuming 2-3 minutes on a questions like this.

Abhinav

Kudos [?]: 21 [0], given: 508

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41893

Kudos [?]: 128873 [0], given: 12183

Re: In a survey of retailers, what percent had purchased [#permalink]

Show Tags

New post 08 Apr 2016, 06:51
abypatra wrote:
Hi Bunuel,

How long should a question like this take to answer? I a atleast consuming 2-3 minutes on a questions like this.

Abhinav


As you can see in timers' stats, average time users took to answer this question correctly is 02:06. So, ~2 minutes should be OK.
_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | 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?
Extra-hard Quant Tests with Brilliant Analytics

Kudos [?]: 128873 [0], given: 12183

Re: In a survey of retailers, what percent had purchased   [#permalink] 08 Apr 2016, 06:51

Go to page    1   2    Next  [ 21 posts ] 

Display posts from previous: Sort by

In a survey of retailers, what percent had purchased

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.