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

It is currently 23 Jul 2014, 13:05

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

Exposure to certain chemicals commonly used in elementary

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
2 KUDOS received
SVP
SVP
avatar
Joined: 16 Nov 2010
Posts: 1692
Location: United States (IN)
Concentration: Strategy, Technology
Followers: 30

Kudos [?]: 275 [2] , given: 36

GMAT Tests User Premium Member Reviews Badge
Exposure to certain chemicals commonly used in elementary [#permalink] New post 17 May 2011, 03:45
2
This post received
KUDOS
7
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

58% (02:26) correct 42% (01:38) wrong based on 658 sessions
Exposure to certain chemicals commonly used in elementary schools as cleaners or pesticides causes allergic reactions in some children. Elementary school nurses in Renston report that the proportion of schoolchildren sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years. Therefore, either Renston’s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago. Which of the following is an assumption on which the argument depends?

A. The number of school nurses employed by Renston’s elementary schools has not decreased over the past ten years.

B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances.

C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago.

D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston.

E. Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years ago.
[Reveal] Spoiler: OA

_________________

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Director
Director
avatar
Status: Matriculating
Affiliations: Chicago Booth Class of 2015
Joined: 03 Feb 2011
Posts: 932
Followers: 11

Kudos [?]: 180 [0], given: 123

Reviews Badge
Re: Exposure to certain chemicals [#permalink] New post 17 May 2011, 07:05
This is a causal arg. Hence the defender will avoid the alternate cause.

Since the number of childern being sent for treatment is on the rise the counterargument can be - more children are being sent for treatment to nurse hence more are being reported sick. The defender will avoid such a controversy and prevent the arg from getting weakened. Hence C

subhashghosh wrote:
Exposure to certain chemicals commonly used in elementary schools as cleaners or pesticides causes allergic reactions in some children. Elementary school nurses in Renston report that the proportion of schoolchildren sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years. Therefore, either Renston’s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago. Which of the following is an assumption on which the argument depends?

A. The number of school nurses employed by Renston’s elementary schools has not decreased over the past ten years.

B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances.

C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago.

D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston.

E. Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years ago.
Manager
Manager
avatar
Joined: 03 Jun 2010
Posts: 184
Location: United States (MI)
Concentration: Marketing, General Management
WE: Business Development (Consumer Products)
Followers: 4

Kudos [?]: 21 [0], given: 40

GMAT ToolKit User GMAT Tests User
Re: Exposure to certain chemicals [#permalink] New post 17 May 2011, 07:17
Why it can't be (B)?
SVP
SVP
avatar
Joined: 16 Nov 2010
Posts: 1692
Location: United States (IN)
Concentration: Strategy, Technology
Followers: 30

Kudos [?]: 275 [0], given: 36

GMAT Tests User Premium Member Reviews Badge
Re: Exposure to certain chemicals [#permalink] New post 17 May 2011, 07:22
@ulm, please negate choice B and see the result.

_________________

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)

Get the best GMAT Prep Resources with GMAT Club Premium Membership

VP
VP
avatar
Status: There is always something new !!
Affiliations: PMI,QAI Global,eXampleCG
Joined: 08 May 2009
Posts: 1365
Followers: 10

Kudos [?]: 131 [0], given: 10

GMAT Tests User
Re: Exposure to certain chemicals [#permalink] New post 17 May 2011, 10:01
close call between A and C here.

Negating A means that as the number of nurses has decreased,even though the number of children sent remains the same,children seen/nurse has increased.

Negating C means it is more likely that children will be sent to the nurses now than earlier.

C seems closer to the conclusion here. The number of nurses hasn't been discussed in the stem.

Hence C preferred.

_________________

Visit -- http://www.sustainable-sphere.com/
Promote Green Business,Sustainable Living and Green Earth !!

Senior Manager
Senior Manager
avatar
Joined: 12 Oct 2009
Posts: 272
Schools: Columbia, INSEAD, RSM, LBS
Followers: 2

Kudos [?]: 29 [0], given: 4

GMAT Tests User
Re: Exposure to certain chemicals [#permalink] New post 17 May 2011, 18:15
C
Intern
Intern
avatar
Joined: 10 Feb 2011
Posts: 4
Location: bangalore, India
Schools: Stanford,MIT, Harvard, Kellogg, LBS, IESE, IE etc
Followers: 0

Kudos [?]: 0 [0], given: 2

GMAT ToolKit User
Re: Exposure to certain chemicals [#permalink] New post 20 Jun 2011, 22:31
Elementary school nurses in Renston report that the proportion of schoolchildren sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years
option C is contradicting the information given in the arguement..

i think C is wrong

i think option D is correct because if there is no usage of chemicals in the home then chemicals are only used in the schools & hence children got affected by that chemical

please explain if i am wrong
Manager
Manager
avatar
Joined: 16 Mar 2011
Posts: 179
Followers: 1

Kudos [?]: 19 [0], given: 13

GMAT Tests User
Re: Exposure to certain chemicals [#permalink] New post 20 Jun 2011, 23:26
C
Manager
Manager
User avatar
Joined: 11 Feb 2011
Posts: 147
Followers: 3

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

GMAT Tests User
Re: Exposure to certain chemicals [#permalink] New post 21 Jun 2011, 04:51
Please can somebody explain it more clearly.I donot understand the logic behind both B and C.

_________________

target:-810 out of 800!

Manager
Manager
avatar
Joined: 16 Mar 2011
Posts: 179
Followers: 1

Kudos [?]: 19 [0], given: 13

GMAT Tests User
Re: Exposure to certain chemicals [#permalink] New post 21 Jun 2011, 04:55
Well indeed it says that the number of children going to nurses now has increased. The next sentence says: Therefore, EITHER, its due to more exposure or the kids just became more sensitive THAN 10 years ago..

In that way C does fit best..
Intern
Intern
avatar
Joined: 01 Apr 2012
Posts: 27
Followers: 0

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

Re: Exposure to certain chemicals commonly used in elementary [#permalink] New post 14 Sep 2012, 22:21
@Antik
If B is assumed, It is likely that children go to nurses for a different sort of allergic reaction. However, the passage specified the type of allergy, allergy to chemicals. So, b is beyond the scope of the passage.

If the increase is due to a higher tendency to go to nurses now than 10 years a go, we rule out or question such causes as more sensitivity or exposure. Thus the argument does not hold with out assuming what is mentioned in C. C is correct.
5 KUDOS received
Intern
Intern
avatar
Joined: 30 Sep 2012
Posts: 12
Location: India
Concentration: Strategy, Finance
GMAT 1: 680 Q49 V32
Followers: 0

Kudos [?]: 14 [5] , given: 4

Re: Exposure to certain chemicals commonly used in elementary [#permalink] New post 30 Sep 2012, 02:37
5
This post received
KUDOS
Question Stem
Which of the following is an assumption on which the argument depends?
Assumption Question- Ask the question - what is required so that the conclusion is true. Also use the negation test on last 2 option choices.

Argument
Exposure to certain chemicals commonly used in elementary schools as cleaners or pesticides causes allergic reactions in some children. Elementary school nurses in Renston report that the proportion of school children sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years. Therefore, either Renston’s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago.

Pre-thinking
More children became aware of the symptoms and reported the same. So they were sent to the nurses.

Answer Choices

A. The number of school nurses employed by Renston’s elementary schools has not decreased over the past ten years.
INCORRECT ANSWER - This answer could have been correct if the argument did not mention "PROPORTION". Even if the nurses reduced, the proportion calculation would still remain the same -
\frac{No of students sent}{Total no of students}


B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances.
INCORRECT ANSWER - "other substances" is outside the scope of the argument

C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago.
CORRECT ANSWER - If the chance that children are sent to the nurse is same, then the conclusion is true.

Negation Test - Children who have allergic reactions to the chemicals are more likely to be sent to a school nurse now than they were ten years ago - So this statement rules out both the options in the conclusion. So this is the CORRECT ANSWER.


D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston.
INCORRECT ANSWER - If not used commonly then the chemical may not be a reason. It weakens the conclusion.

E. Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years ago.
INCORRECT ANSWER - "larger proportion of Renston’s population" - this does not matter. The argument is not talking about this but the proportion of students sent to nurses.

_________________

Regards,
gmatsuperstar

Senior Manager
Senior Manager
User avatar
Status: struggling with GMAT
Joined: 06 Dec 2012
Posts: 310
Location: Bangladesh
Concentration: Accounting
GMAT Date: 04-06-2013
GPA: 3.65
Followers: 7

Kudos [?]: 90 [0], given: 46

Re: Exposure to certain chemicals commonly used in elementary [#permalink] New post 17 Apr 2013, 04:15
subhashghosh wrote:
Exposure to certain chemicals commonly used in elementary schools as cleaners or pesticides causes allergic reactions in some children. Elementary school nurses in Renston report that the proportion of schoolchildren sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years. Therefore, either Renston’s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago. Which of the following is an assumption on which the argument depends?

A. The number of school nurses employed by Renston’s elementary schools has not decreased over the past ten years.

B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances.

C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago.

D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston.

E. Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years ago.


I picked d.Need every option`s explanation
Intern
Intern
avatar
Joined: 25 Jan 2012
Posts: 7
Followers: 0

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

Re: Exposure to certain chemicals commonly used in elementary [#permalink] New post 17 Apr 2013, 05:29
Quote:
Exposure to certain chemicals commonly used in elementary schools as cleaners or pesticides causes allergic reactions in some children. Elementary school nurses in Renston report that the proportion of schoolchildren sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years. Therefore, either Renston’s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago. Which of the following is an assumption on which the argument depends?

A. The number of school nurses employed by Renston’s elementary schools has not decreased over the past ten years.
B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances.
C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago.
D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston.
E. Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years ago.


Paraphrasing the main point: According to nurses, something has changed in the past 10 years to make schoolchildren more sensitive to chemicals.
Paraphrasing the conclusion: 1) more chemicals, or 2) more sensitivity to the chemicals

A. I saw this as irrelevant. The number of nurses doesn't matter to establishing a proportion. The main point and conclusion can still be valid even with less nurses.
B. Comparing chemical allergies to other allergies is not within the stated argument. Also irrelevant.
C. This is correct. It offers an alternative explanation of why nurses would see an increase in the number of students sent to them with chemical allergies even if there weren't more chemicals or if the sensitivities had not changed.
D. The location of the exposure to chemicals is not relevant to the argument or conclusion. If D were true and chemicals were commonly used elsewhere, that would actually strengthen argument 1) as a reason for increased exposure.
E. Irrelevant. Schoolchildren to overall population proportion has nothing to do with the passage.
3 KUDOS received
Verbal Forum Moderator
Verbal Forum Moderator
User avatar
Joined: 15 Jun 2012
Posts: 992
Location: United States
Followers: 112

Kudos [?]: 1094 [3] , given: 118

Re: Exposure to certain chemicals commonly used in elementary [#permalink] New post 17 Apr 2013, 13:28
3
This post received
KUDOS
mun23 wrote:
subhashghosh wrote:
Exposure to certain chemicals commonly used in elementary schools as cleaners or pesticides causes allergic reactions in some children. Elementary school nurses in Renston report that the proportion of schoolchildren sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years. Therefore, either Renston’s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago. Which of the following is an assumption on which the argument depends?

A. The number of school nurses employed by Renston’s elementary schools has not decreased over the past ten years.

B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances.

C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago.

D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston.

E. Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years ago.


I picked d.Need every option`s explanation


Hi Mun23.
My pleasure to help.

Premise: exposure to chemical ==> allergic reactions
Premise: the proportion of schoolchildren sent to them for treatment of allergic reactions increase
Conclusion: more children exposed to greater quantities of the chemicals, or they are more sensitive

Assumption: proportion = children who got allergy and were brought to hospital / Total children.
KEY is "children actually were brought to hospital". If they got allergy and NOT went to hospital, they are not counted.

A. The number of school nurses employed by Renston’s elementary schools has not decreased over the past ten years.
Wrong. Out of scope.

B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances.
Wrong. Out of scope

C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago.
Correct. This is the assumption above.

D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston.
Wrong. SHELL GAME. "are NOT used in houses & apartment" DOES NOT MEAN "are used in school". What if the chemical are not commonly used in both school & houses.==> We cannot conclude children exposed to greater quantities of the chemicals.

E. Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years ago.
Wrong. We cannot conclude the number of children increased or decreased, because the proportion also depends on the total population that may increase or decrease.

Hope it helps a little bit.

_________________

Please +1 KUDO if my post helps. Thank you.

"Designing cars consumes you; it has a hold on your spirit which is incredibly powerful. It's not something you can do part time, you have do it with all your heart and soul or you're going to get it wrong."

Chris Bangle - Former BMV Chief of Design.

Expert Post
BSchool Forum Moderator
avatar
Joined: 27 Aug 2012
Posts: 1095
Followers: 71

Kudos [?]: 413 [0], given: 99

Premium Member CAT Tests
Re: Exposure to certain chemicals commonly used in elementary [#permalink] New post 23 Aug 2013, 01:29
Expert's post
Hi e-GMAT(Chiranjeev),
Can you please come up with an explanation and analysis for this qs.

Would much appreciate your feedback.

_________________

UPDATED : e-GMAT SC Resources-Consolidated || ALL RC Resources-Consolidated || ALL SC Resources-Consolidated || UPDATED : AWA compilations-109 Analysis of Argument Essays || NEW !!! GMAC's IR Prep Tool

GMAT Club guide - OG 11-12-13 || Veritas Blog || Manhattan GMAT Blog


KUDOS please, if you like the post or if it helps :-)

2 KUDOS received
Manager
Manager
avatar
Status: Persevering
Joined: 15 May 2013
Posts: 223
Location: India
Concentration: Technology, Leadership
GMAT Date: 08-02-2013
GPA: 3.7
WE: Consulting (Consulting)
Followers: 0

Kudos [?]: 46 [2] , given: 34

GMAT ToolKit User
Re: Exposure to certain chemicals commonly used in elementary [#permalink] New post 25 Aug 2013, 08:55
2
This post received
KUDOS
In these types of questions, the argument provides us with possible conclusions; what we must intend to find is that are any alternate reasons refuted or not ?

If C were not true, then the argument will fall apart, as it gives us an alternate reason for the increase in the number of students who are ill. Therefore, C has to be the assumption.

_________________

--It's one thing to get defeated, but another to accept it.

1 KUDOS received
Intern
Intern
User avatar
Joined: 22 Sep 2012
Posts: 21
GMAT Date: 09-12-2013
Followers: 0

Kudos [?]: 6 [1] , given: 35

GMAT ToolKit User
Re: Exposure to certain chemicals commonly used in elementary [#permalink] New post 25 Aug 2013, 11:47
1
This post received
KUDOS
ramannanda9 wrote:
In these types of questions, the argument provides us with possible conclusions; what we must intend to find is that are any alternate reasons refuted or not ?

If C were not true, then the argument will fall apart, as it gives us an alternate reason for the increase in the number of students who are ill. Therefore, C has to be the assumption.



Finally, I understood.

Thanks.(+1)

_________________

If KUDOS then gmatclub Test series.
YEAH!!

Verbal Forum Moderator
Verbal Forum Moderator
User avatar
Joined: 22 Mar 2013
Posts: 716
Location: India
GPA: 3.51
WE: Information Technology (Computer Software)
Followers: 8

Kudos [?]: 127 [0], given: 121

Premium Member CAT Tests
Re: Exposure to certain chemicals commonly used in elementary [#permalink] New post 05 Dec 2013, 12:53
D, is the only best option, if we negate option D, we will get a conclusion which will weak the "either option 1 or option 2" in conclusion as it will raise option 3, and in that case authors conclusion will become ineffective.

_________________

Piyush K
-----------------------
Our greatest weakness lies in giving up. The most certain way to succeed is to try just one more time. ― Thomas A. Edison
Don't forget to press--> Kudos :)
My Articles: WOULD: when to use?
Tip: Before exam a week earlier don't forget to exhaust all gmatprep problems specially for "sentence correction".

Senior Manager
Senior Manager
avatar
Joined: 06 Aug 2011
Posts: 408
Followers: 2

Kudos [?]: 48 [0], given: 82

CAT Tests
Re: Exposure to certain chemicals commonly used in elementary [#permalink] New post 16 Mar 2014, 21:57
I got wrong.. I chose option B..

In assumption question , when argument give few reasons or cause of something.. then in assumption question, usually we do say that no anything else is the cause of that effect..
i mean in this question,
, either Renston’s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago.


Two reasons have been given for proportion of children of elementry school have increased to elergy..
So i chose B because it says that there is no anyother substance that affect those children.



will anyone explain where m wrong?? experts?

_________________

Bole So Nehal.. Sat Siri Akal.. Waheguru ji help me to get 700+ score !

Re: Exposure to certain chemicals commonly used in elementary   [#permalink] 16 Mar 2014, 21:57
    Similar topics Author Replies Last post
Similar
Topics:
Exposure to certain chemicals commonly used in elementary dkverma 7 07 Aug 2010, 13:59
1 Exposure to certain chemicals commonly used in elementary seluka 5 10 Dec 2009, 16:13
2 Exposure to certain chemicals commonly used in elementary reply2spg 10 21 Feb 2009, 22:54
Exposure to certain chemicals commonly used in elementary johnycute 4 19 Jun 2007, 21:53
1 Exposure to certain chemicals commonly used in elementary marine 6 21 Sep 2004, 03:02
Display posts from previous: Sort by

Exposure to certain chemicals commonly used in elementary

  Question banks Downloads My Bookmarks Reviews Important topics  

Go to page    1   2    Next  [ 21 posts ] 



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®.