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# Air travel is becoming increasingly more dangerous. In the

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05 May 2011, 07:04
Clear A.
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05 May 2011, 09:39
Good Explanation by bigoyal IMO A
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05 May 2011, 09:48
Logically, IMHO the best answer is A.

B - Weakens the argument vs *other* forms of transport, just doesn't weaken the argument when simply talking about *air* transport, which is the subject at hand.
C - That's well and good, but (getting back to topic) the danger to air travel might nonetheless still be getting more dangerous.
D - Fine, but then by extension of the argument *all* forms of transport are getting more dangerous.
E - This actually strengthens the argument (ie, if fewer people are flying *and* collisions are up).

If there's any hole in my reasoning, I welcome comments. As I can benefit from it too.
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05 May 2011, 11:15
A. Logical weakener
B. out of scope
C. out of scope
D. out of scope
E. Strengthens the argument
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05 May 2011, 13:18
A.
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06 May 2011, 00:55
IMO A

Conclusion: Air travel is becoming increasingly more dangerous.
Evidence: In the last year there have been seven major collisions resulting in over 700 deaths, more deaths than in any previous year.

Which statement, if true, would most weaken the argument above?

(A) Since the volume of air traffic has been increasing all the time, an increase in the number of deaths due to collisions does not necessarily mean greater danger. --> Weaken the argument.
An increase of death people from air traffic last year does not mean that air travel is more dangerous. We should compare it in terms of % rather than number.
Last year: 700 deaths, the volume of air traffic 2 Million ---> 350 ppm.
Previous year: Let's assume 500 deaths, the volume of air traffic 1 Million --> 500 ppm.
As a result, percentage of air traffic death per fly in last year (350 ppm) is lower than that in previous year(500 ppm).

(B) The increase in collisions can be explained by statistical coincidence, hijackings, and unusual weather.
--> The given information described the cause of 700 deaths from air travel in last year but did not weaken the argument.
(C) Mortality per passenger mile is lower for air travel than for any kind of surface transportation.
--> Out of Scope - the argument discussed only air traffic transportation.
(D) The increase in deaths due to collision in air travel has proceeded at a rate identical to that for deaths in all other major forms of transportation.
--> Out of Scope - The argument did not compare death rate in air travel with other types of transportation.
(E) Last year the average number of passengers per flown plane was significantly lower than that of previous years.
--> Strengthen the argument
Last year: 700 deaths, the volume of air traffic 0.7 Million ---> 1,000 ppm.
Previous year: Let's assume 500 deaths, the volume of air traffic 1 Million --> 500 ppm.
As a result, percentage of air traffic death per fly in last year (1,000 ppm) is higher than that in previous year(500 ppm).

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06 May 2011, 23:51
conclusion -Air traveli sdangerous
Assumtion-no acidents/deaths in other modes of travel
hence -c
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09 May 2011, 17:28
I went with D, but later realized that author is not talking about other modes of travel
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Re: Air travel is becoming increasingly more dangerous. In the [#permalink]

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25 Apr 2014, 07:18
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28 Jun 2015, 18:56
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Re: Air travel is becoming increasingly more dangerous. In the [#permalink]

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22 Jul 2016, 02:59
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Re: Air travel is becoming increasingly more dangerous. In the [#permalink]

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14 Oct 2016, 23:53
jaxtor wrote:
Air travel is becoming increasingly more dangerous. In the last year there have been seven major collisions resulting in over 700 deaths, more deaths than in any previous year.

Which statement, if true, would most weaken the argument above?

(A) Since the volume of air traffic has been increasing all the time, an increase in the number of deaths due to collisions does not necessarily mean greater danger.

(B) The increase in collisions can be explained by statistical coincidence, hijackings, and unusual weather.

(C) Mortality per passenger mile is lower for air travel than for any kind of surface transportation.

(D) The increase in deaths due to collision in air travel has proceeded at a rate identical to that for deaths in all other major forms of transportation.

(E) Last year the average number of passengers per flown plane was significantly lower than that of previous years.

Guys please explain this one with the fullest possible details and explanations....

Best R-
Jaxtor

Premise : Last year , there were 7 major collissions >> 700 deaths , more deaths than in any previous year
Conclusion : Therefore , Air travel is increasingly becoming dangerous

Pre thinking : To undermine this conclusion , we have to think on the lines of more deaths. What if the death per plane has decreased in the last year ?
this would mean that the number of airplanes have significantly increased than previous years . With this in mind , lets look at the options

A) Since the volume of air traffic has been increasing all the time, an increase in the number of deaths due to collisions does not necessarily mean greater danger.
This echos what we thought in pre thinking . correct

(B) The increase in collisions can be explained by statistical coincidence, hijackings, and unusual weather.
this tells us the reason for deaths , not in any way helps us undermine that air travel is becoming dangerous . Moreover , this partially supports the argument

(C) Mortality per passenger mile is lower for air travel than for any kind of surface transportation.
Irrelevant as it compares air travel with other transportation .the argument only talks about air travel

(D) The increase in deaths due to collision in air travel has proceeded at a rate identical to that for deaths in all other major forms of transportation.
Same error as in option (C)

(E) Last year the average number of passengers per flown plane was significantly lower than that of previous years.
This strengthens the argument as the # of passengers are less , still the deaths are more >> this supports the fact that Air travel is becoming increasingly dangerous
Re: Air travel is becoming increasingly more dangerous. In the   [#permalink] 14 Oct 2016, 23:53

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