Student Advisor: One of our exchange students faced multiple : GMAT Critical Reasoning (CR)
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# Student Advisor: One of our exchange students faced multiple

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02 Sep 2011, 05:49
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Student Advisor: One of our exchange students faced multiple arguments with her parents over the course of the past year. Not surprisingly, her grade point average (GPA)over the same period showed a steep decline. This is just one example of a general truth: problematic family relationships can cause significant academic difficulties for our students.

Which of the following is an assumption underlying the general truism claimed by the Student Advisor?
(A) Last year, the exchange student reduced the amount of time spent on academic work, resulting in a lower GPA.
(B) The decline in the GPA of the. exchange student was not the reason for the student's arguments with her parents.
(C) School GPA is an accurate measure of a student's intellectual ability.
(D) If proper measures are not taken, the decline in the student's academic performance may become irreversible.
(E) Fluctuations in academic performance are typical for many students.

Source:MGMAT 4th Edition
[Reveal] Spoiler: OA
If you have any questions
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08 Sep 2011, 03:18
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ankit1234suhane wrote:
assumption is link between premise and conclusion if that is true how come OA is B?. OA B is reversal of conclusion.
Pls explain

Two things happened:
1. The student scored low.
2. The student had arguments with her parents.

While these two evidences seem to be interdependent, they may very well not be.

The student may be scoring low because of a third reason; perhaps she wants to pursue a different career altogether. Perhaps the very cause that triggered event 1 above could have also triggered 2, who knows.

Just because we are presented with two events, we can't deduce that one occurred because of the other.

(B) just reiterates one of the possible assumptions. It's excluding the possibility that event 1 caused event 2. For the conclusion to be true, we must at least make this assumption. There may be 1000 other assumptions to become sure of the conclusion; however, B should be one among those. "After all, an assumption" is what's asked.

Ans: "B"

****************************************************
Note: "B" alone wouldn't be sufficient to validate the conclusion.
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02 Sep 2011, 07:08
B. (cause reversal)
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02 Sep 2011, 19:51
ganjupatel wrote:
B. (cause reversal)

B by logic X > Y to hold true Y >/ X
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03 Sep 2011, 05:48
avinash84 wrote:
ganjupatel wrote:
B. (cause reversal)

B by logic X > Y to hold true Y >/ X

??
sorry didn't get u?
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08 Sep 2011, 01:07
B
Exchage student get lower GPA ----> multiple arguments with paraents.

assumption here is that lower GPA is not the reason for arguments (assumption makes sure that there is no alternate path to the conclusion)
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08 Sep 2011, 02:50
assumption is link between premise and conclusion if that is true how come OA is B?. OA B is reversal of conclusion.
Pls explain
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15 Sep 2011, 03:47
B is the answer.. Good question MGMAT!
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20 Sep 2011, 19:37
Clear B. Negate it & the argument Falls Apart.
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22 Sep 2011, 02:19
fluke wrote:
ankit1234suhane wrote:
assumption is link between premise and conclusion if that is true how come OA is B?. OA B is reversal of conclusion.
Pls explain

Two things happened:
1. The student scored low.
2. The student had arguments with her parents.

While these two evidences seem to be interdependent, they may very well not be.

The student may be scoring low because of a third reason; perhaps she wants to pursue a different career altogether. Perhaps the very cause that triggered event 1 above could have also triggered 2, who knows.

Just because we are presented with two events, we can't deduce that one occurred because of the other.

(B) just reiterates one of the possible assumptions. It's excluding the possibility that event 1 caused event 2. For the conclusion to be true, we must at least make this assumption. There may be 1000 other assumptions to become sure of the conclusion; however, B should be one among those. "After all, an assumption" is what's asked.

Ans: "B"

****************************************************
Note: "B" alone wouldn't be sufficient to validate the conclusion.

Hi FLuke,

What is the conclusion of the argument ?

Is it => problematic family relationships can cause significant academic difficulties for our students?

Also,

why is D wrong?

If we negate D => If proper measures are taken, the decline in the student's academic performance may become irreversible. (Is my negation correct?)

It doesnt affect the conclusion?

And why is B correct ?

since

student had argument -> low gpa

but low gpa doesnt mean student had argument ... is this the assumption???
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22 Sep 2011, 03:00
siddhans wrote:
Hi FLuke,

What is the conclusion of the argument ?

Is it => problematic family relationships can cause significant academic difficulties for our students?
Correct.

Also,

why is D wrong?

If we negate D => If proper measures are taken, the decline in the student's academic performance may become irreversible. (Is my negation correct?)

It doesnt affect the conclusion?
Perhaps Correct. I'm not good with negation, neither do I use it for assumption CR as many others do. Theoretically, it talks about the gravity of the issue and its repercussions, but it doesn't support the conclusion HOW the family argument is responsible. It assumes the conclusion AS true and provides a warning. It is not an assumption per se.

And why is B correct ?
since
student had argument -> low gpa
but low gpa doesnt mean student had argument ... is this the assumption???

Like I said in my earlier post, it is one of the assumptions.

I mean what's the guarantee that the argument IS NOT due to the LOW GPA.

Author knows two discrete events:
Student secured low GPA.
Author says: Ah!!! The low GPA was due to the argument. So, she at least assumed that low GPA didn't incite the argument.

You should read CR Bible Chapter 7:
"CAUSE AND EFFECT REASONING"

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22 Sep 2011, 09:36
I ruled out B because i thought it weakens the argument and picked D
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23 Sep 2011, 19:28

Assumption is :Low GPA did not cause argument with parents.
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24 Sep 2011, 20:03
bholakc wrote:
Student Advisor: One of our exchange students faced multiple arguments with her parents over the course of the past year. Not surprisingly, her grade point average (GPA)over the same period showed a steep decline. This is just one example of a general truth: problematic family relationships can cause significant academic difficulties for our students.

Which of the following is an assumption underlying the general truism claimed by the Student Advisor?
(A) Last year, the exchange student reduced the amount of time spent on academic work, resulting in a lower GPA.
(B) The decline in the GPA of the. exchange student was not the reason for the student's arguments with her parents.
(C) School GPA is an accurate measure of a student's intellectual ability.
(D) If proper measures are not taken, the decline in the student's academic performance may become irreversible.
(E) Fluctuations in academic performance are typical for many students.

Source:MGMAT 4th Edition

Conclusion: Problematic family relationships --> significant academic difficulties for students
Premise: in the same period, an exchange student experienced... --> multiple arguments with parents + decline in GPA
Assumption: Low GPA was not the cause of arguments

--> If the arguments with parents were caused by decline in GPA, conclusion will not stand.
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30 Sep 2011, 12:14
Great explanation fluke!

This is a classic type of assumption. Anytime you are presented with an observation about two events that CORRELATE, and the conclusion makes a CAUSAL claim, it's a very good idea to check that there were not alternate models of causation that could have explained the observed phenomenon.

Remember that you're looking for a *necessary* assumption for these arguments--without that assumption being true, the argument falls apart. As gmatpassion said above, if you negate choice B the conclusion will no longer hold. That means the positive version of the answer choice must have been necessary to uphold the conclusion. In this case, the argument makes a causal claim (family problems CAUSE academic difficulties) based on the observed correlation between one student's drop in GPA and that student's family difficulties. This observation is of two events that happened at the SAME TIME. CAUSATION, however, implies that one happened BEFORE the other and LED to the other. One possible explanation of the correlation is the conclusion mentioned, but it's just as possible that the reverse model of causation was true (or that some third unknown factor caused both...for example, what if the student developed a psychological disorder that affected both relationships and GPA?)

I don't recommend defaulting to negation for all five choices because it can take some time, but if you're down to 2 answers choices and are having a hard time figuring out which is necessary and which is merely "helpful," negation is a very powerful tool. Here, if we say that the GPA decline WAS the reason for the arguments, then it's not possible for the arguments to have been the reason for the GPA decline (as the original conclusion posits). This must be our answer.
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18 Oct 2011, 09:44
B++
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18 Oct 2011, 11:35
B
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29 Oct 2011, 02:41

Hi. I am not sure if this would make a 700 level qn;
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16 Dec 2011, 02:00
Causal relationship. Reverse one for choice B
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19 Dec 2011, 22:47
Nice question but not that difficult. Even I think this is not 700-level.
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Re: Student Advisor: One of our exchange students faced multiple   [#permalink] 19 Dec 2011, 22:47

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