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# If the airspace around centrally located airports were

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If the airspace around centrally located airports were [#permalink]

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09 May 2011, 10:46
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Official Guide for GMAT Verbal Review, 2nd Edition

Practice Question
Question No.: 34
Page: 128
Difficulty:

If the airspace around centrally located airports were restricted to commercial airliners and only those private planes equipped with radar, most of the private-plane traffic would be forced to use outlying airfields.Such a reduction in the amount of private-plane traffic would reduce the risk of midair collision around the centrally located airports

The conclusion drawn in the first sentence depends on which of the following assumptions?

(A) Outlying airfields would be as convenient as centrally located airports for most pilots of private planes．
(B) Most outlying airfields are not equipped to handle commercial-airline traffic．
(C) Most private planes that use centrally located airports are not equipped with radar．
(D) Commercial airliners are at greater risk of becoming involved in midair collisions than are private planes．
(E) A reduction in the risk of midair collision would eventually lead to increases in commercial airline traffic．
[Reveal] Spoiler: OA

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Last edited by Narenn on 17 Oct 2013, 02:09, edited 4 times in total.
Slight Tweak

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Re: Clearity regarding question wording required [#permalink]

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09 May 2011, 12:53
yeh me too got the answer right, but not sure.. in a way i thought st-1 as conclusion and the last statement as reasoning for that conclusion..

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Re: Clearity regarding question wording required [#permalink]

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09 May 2011, 13:06
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+1 C

There are tow types of private planes: those with radar and those without it.
Those with radar are allowed to fly in the restricted area.
Those without radar cannot fly in the restricted area, and they are a lot.
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Re: Clearity regarding question wording required [#permalink]

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09 May 2011, 20:59
Negating C clearly crashes the conclusion.
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Re: If the airspace around centrally located airports were [#permalink]

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21 Mar 2012, 17:53
I have picked C for this question:

The conclusion is: [highlight]The risk of midair collisions are the centrally located airports would be reduced.[/highlight]

A. This does not make sense. The reason for moving many of the private planes to the outlying airfields is not because of the convenience for the pilots.

B. Whether the outlying airfields can handle commercial airline traffic is irrelevant.

C. This is the correct answer. The passage states that "centrally located airports were restricted to commercial airliners and only those private planes equipped with radar." Therefore, the type of plane that cannot use the centrally located airports are the private planes that do not have radar.

D. This is not the assumed reason for moving private airplanes to outlying airfields.

E. How does the passage even prove this? This cannot be assumed.

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Re: If the airspace around centrally located airports were [#permalink]

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21 Mar 2012, 21:03
C is the best option for the argument
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Re: If the airspace around centrally located airports were [#permalink]

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04 Apr 2012, 22:38
IMO C......

if some planes are allowed then why some are not allowed?

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Re: If the airspace around centrally located airports were [#permalink]

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08 Feb 2013, 08:13
lets diagram

restricted to privat plain with rada----->use outside airfield----> reduction trafic and accident

I call this type of argument "2 arrow in sequence"

in this type of argument,normally assumption which we are required to find is the assumption which is on the last arrow/last relation. but sometimes, the assumption which we have to find is assumption on the first arrow as in this case.

the process of prethinking an assmption should be on the last arrow/last relation. but when do not see the match in the answer choice, thing about an assumption on the first arrow.

gmat , of couse, know this pattern because they create questions. they create the experimental questions to test out reaction to each type of question and answer. suppose we are gmat and we have to create the questions, we will realize the patterns.

pls, commeny on my thinking.
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If the airspace around centrally located airport were [#permalink]

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13 Feb 2013, 19:37
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If the airspace around centrally located airport were restricted to commercial airlines and only those private equipped with radar, most of the private-plane traffic would be forced to use outlying airfields. Such a reduction in the amount of private-plane traffic would reduce the risk of midair collision around the centrally located airports.

The conclusion drawn in the first sentence depends on which of the following assumptions?

(A)Outlying airfields would be as convenient as centrally located airports for most pilots of private planes.

(B)Most outlying airfields are not equipped to handle commercial-airline traffic.

(C)Most private planes that use centrally located airports are not equipped with radar.

(D)Commercial airlines are at greater risk of becoming involved in midair collisions than are private planes.

(E)A reduction in the risk of midair collision would eventually lead to increase in commercial airline traffic.

Thanks
H
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Last edited by broall on 04 Jul 2017, 01:09, edited 1 time in total.
Merged post. Please search before posting

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Re: If the airspace around centrally located airport were [#permalink]

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13 Feb 2013, 20:04
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imhimanshu wrote:
If the airspace around centrally located airport were restricted to commercial airlines and only those private equipped with radar, most of the private-plane traffic would be forced to use outlying airfields. Such a reduction in the amount of private-plane traffic would reduce the risk of midair collision around the centrally located airports.

The conclusion drawn in the first sentence depends on which of the following assumptions?

(A)Outlying airfields would be as convenient as centrally located airports for most pilots of private planes.

(B)Most outlying airfields are not equipped to handle commercial-airline traffic.

(C)Most private planes that use centrally located airports are not equipped with radar.

(D)Commercial airlines are at greater risk of becoming involved in midair collisions than are private planes.

(E)A reduction in the risk of midair collision would eventually lead to increase in commercial airline traffic.

Thanks
H

+1C
To be noted question is "Assumptions of the conclusion drawn in the first sentence"

(A)Outlying airfields would be as convenient as centrally located airports for most pilots of private planes. -- not concerned about airfields

(B)Most outlying airfields are not equipped to handle commercial-airline traffic. -- not concerned about airfields

(C)Most private planes that use centrally located airports are not equipped with radar. -- Correct --- There is a restriction for private planes without radar, coz of this most of planes are outside airport (means most of them are without radar)

(D)Commercial airlines are at greater risk of becoming involved in midair collisions than are private planes. -- We are concerned about private planes specifically not general commercial airlines

(E)A reduction in the risk of midair collision would eventually lead to increase in commercial airline traffic. -- This is assumption of final conclusion
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Re: If the airspace around centrally located airport were [#permalink]

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13 Feb 2013, 20:45
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imhimanshu wrote:
If the airspace around centrally located airport were restricted to commercial airlines and only those private equipped with radar, most of the private-plane traffic would be forced to use outlying airfields. Such a reduction in the amount of private-plane traffic would reduce the risk of midair collision around the centrally located airports.

The conclusion drawn in the first sentence depends on which of the following assumptions?

(A)Outlying airfields would be as convenient as centrally located airports for most pilots of private planes.

(B)Most outlying airfields are not equipped to handle commercial-airline traffic.

(C)Most private planes that use centrally located airports are not equipped with radar.

(D)Commercial airlines are at greater risk of becoming involved in midair collisions than are private planes.

(E)A reduction in the risk of midair collision would eventually lead to increase in commercial airline traffic.

Thanks
H

First sentence: If the airspace around centrally located airport were restricted to commercial airlines and only those private equipped with radar, most of the private-plane traffic would be forced to use outlying airfields.

Conclusion of the first sentence: most of the private-plane traffic would be forced to use outlying airfields.

We need to find the assumption in this conclusion, not in the conclusion of the argument.
Here, the author is assuming that if airports do not allow non-radar private planes to enter its airspace, most private planes will not be able to enter airport airspace. This means he is assuming that most private planes do not have radar.

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Re: If the airspace around centrally located airport were [#permalink]

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13 Feb 2013, 21:43
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imhimanshu wrote:
If the airspace around centrally located airport were restricted to commercial airlines and only those private equipped with radar, most of the private-plane traffic would be forced to use outlying airfields. Such a reduction in the amount of private-plane traffic would reduce the risk of midair collision around the centrally located airports.

The conclusion drawn in the first sentence depends on which of the following assumptions?

(A)Outlying airfields would be as convenient as centrally located airports for most pilots of private planes.

(B)Most outlying airfields are not equipped to handle commercial-airline traffic.

(C)Most private planes that use centrally located airports are not equipped with radar.

(D)Commercial airlines are at greater risk of becoming involved in midair collisions than are private planes.

(E)A reduction in the risk of midair collision would eventually lead to increase in commercial airline traffic.

Thanks
H

Hi Himanshu,

Good question.

The question stem says that the conclusion in the first sentence. If we analyze the structure of the sentence, then we will see that the stimulus contains two opinions

i) most of the private-plane traffic would be forced to use outlying airfields.
ii) Such a reduction in the amount of private-plane traffic would reduce the risk of midair collision around the centrally located airports.

The overall structure goes like this: First part of the fist sentence is the premise for i) and i) is used as a premise for the main conclusion ii).

i) is the intermediate conclusion, which the questions stem talks about.

We have to find an assumption that the author has to make to make his claim valid. Our assumption should validate that "most of the private-plane traffic would be forced to use outlying airfields"
First sentence says "only those private equipped with radar", so, the commercial planes not equipped with radar would not be able to use the airspace around the centrally located airport. Now, if most planes do not have a radar then they will be forced to use outlaying fields, reducing the overall traffic. Answer choice (C) does is very well, others could be true, but not necessarily validate the conclusion.

Hope that helps,

Vercules
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Re: If the airspace around centrally located airports were [#permalink]

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27 Jun 2013, 20:27
Hi tanviet,

Can you please explain this pattern by giving few examples.
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Re: If the airspace around centrally located airports were [#permalink]

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13 Nov 2014, 08:45
Hello from the GMAT Club VerbalBot!

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Re: If the airspace around centrally located airports were [#permalink]

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12 Feb 2016, 06:05
Hello from the GMAT Club VerbalBot!

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).

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Re: If the airspace around centrally located airport were [#permalink]

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26 Feb 2016, 12:09
Hello from the GMAT Club VerbalBot!

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Re: If the airspace around centrally located airports were [#permalink]

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18 Dec 2016, 06:38
GMATD11 wrote:
If the airspace around centrally located airports were restricted to commercial airliners and only those private planes equipped with radar, most of the private-plane traffic would be forced to use outlying airfields.Such a reduction in the amount of private-plane traffic would reduce the risk of midair collision around the centrally located airports

Conclusion in first sentence- most of the private-plane traffic would be forced to use outlying airfields
Pre-thinking - Most of private planes that use centrally located airport are not equipped with radar .

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Re: If the airspace around centrally located airports were [#permalink]

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18 Jan 2017, 17:00
(A) Outlying airfields would be as convenient as centrally located airports for most pilots of private planes．
the convinience is not the central focus of the argument and thus is out of scope
(B) Most outlying airfields are not equipped to handle commercial-airline traffic．
the capacity of an airfield to handel the traffic is again out of scope of the argument.
(C) Most private planes that use centrally located airports are not equipped with radar．
Most apt answer choice since if you do negation test on this this will break the argument and there will be no need of using a seperate airfield
(D) Commercial airliners are at greater risk of becoming involved in midair collisions than are private planes．
protecting the commercial airliners is no tthe sole motive of the move to use the alternate airfiled all aircrafts are to be protected.
(E) A reduction in the risk of midair collision would eventually lead to increases in commercial airline traffic．
this is not the asumption this is a good conclusion but cannot be assumed from the given argument.

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Re: If the airspace around centrally located airport were [#permalink]

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12 May 2017, 09:35
still takes too much time to answer 1 question, even though this question is easy

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If the airspace around centrally located airports were [#permalink]

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12 Jun 2017, 04:32
If the airspace around centrally located airports were restricted to commercial airliners and only those private planes equipped with radar, most of the private-plane traffic would be forced to use outlying airfields.Such a reduction in the amount of private-plane traffic would reduce the risk of midair collision around the centrally located airports

Since the objective is to reduce the traffic thereby reducing risk of midair collision at centrally located airports, retaining private places with radar to centrally located airports and shifting the rest of the private-plane traffic to outlying airfields would only result in reduced traffic at centrally located airports -> if the private planes with radar are much less than private planes without radar, which is what has to be the clear assumption of the one who is making this statement. Else there is no point in retaining the private planes with radar to centrally located airports if their quantity is not substantially less.
Therefore C is CORRECT

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If the airspace around centrally located airports were   [#permalink] 12 Jun 2017, 04:32

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