Air Travel--Kaplan

This topic has expert replies
Master | Next Rank: 500 Posts
Posts: 119
Joined: Mon Jun 28, 2010 9:42 pm
Location: Pune
Thanked: 1 times
Followed by:1 members
GMAT Score:660

by 786 » Sat Jul 03, 2010 2:07 am
Yes , now that is a tricky thing .
any alternate piece of information that is within the scope of the argument .

The argument here is speaking only about Air travel .

Master | Next Rank: 500 Posts
Posts: 379
Joined: Wed Apr 07, 2010 12:53 am
Location: Chennai,India
Thanked: 3 times

by paddle_sweep » Sat Jul 03, 2010 9:09 pm
I would say that B strengthens the argument. It says air travel is dangerous.

Master | Next Rank: 500 Posts
Posts: 301
Joined: Sun Mar 21, 2010 3:18 pm
Thanked: 4 times

by ansumania » Sun Jul 18, 2010 11:45 pm
It can't be A......what could be the reasons , it is finally saying that the no. of accidents is increasing.........

B is saying that the increase is one time due to unusual events..........

Pl. comment

User avatar
Legendary Member
Posts: 1261
Joined: Sun Sep 14, 2008 3:46 am
Thanked: 27 times
GMAT Score:570

by reply2spg » Tue Jul 20, 2010 9:36 pm
A is good here. Let's say there are 7,000,000 people travel by air. In that case 700 is just 0.01%

If for each other mode of transportation 100 people are traveling and 7 deaths, then also it is 7%, which is more.

Therefore, A is correct
ru2008 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.


The book reasons that 'E' means more collisions? Can someone please explain why?
Sudhanshu
(have lot of things to learn from all of you)

Senior | Next Rank: 100 Posts
Posts: 95
Joined: Tue Jun 08, 2010 11:27 am
Thanked: 7 times

by singhpreet1 » Wed Jul 21, 2010 2:13 am
kvcpk wrote:
786 wrote:We are comparing deaths by air travel only .......... i.e deaths by air travel in two particular years .
So talking about other modes transport becomes irrelevant to the argument !
But in a weaken question, we are allowed to assume that the answer choices are right..
i originally thought it was D too..lets go deeper.

Evidence: seven major collisions resulting in over 700 deaths
Conclusion: Air travel is becoming increasingly dangerous

(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. - Correct. Provides an explanation for increase in number of accidents. Percentage of accidents may or may not have changed. (Source: GMAT CLUB)

Preet

Master | Next Rank: 500 Posts
Posts: 301
Joined: Sun Mar 21, 2010 3:18 pm
Thanked: 4 times

by ansumania » Wed Jul 21, 2010 6:16 am
reply2spg wrote:A is good here. Let's say there are 7,000,000 people travel by air. In that case 700 is just 0.01%

If for each other mode of transportation 100 people are traveling and 7 deaths, then also it is 7%, which is more.

Therefore, A is correct
ru2008 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.


The book reasons that 'E' means more collisions? Can someone please explain why?
hi,

it makes sense that the percentage could be lower. Still, if the absolute no. is increasing, the threat is increasing......

User avatar
Legendary Member
Posts: 1261
Joined: Sun Sep 14, 2008 3:46 am
Thanked: 27 times
GMAT Score:570

by reply2spg » Wed Jul 21, 2010 7:39 am
Agree with you that threat is increasing. However, threat is increasing with other modes of transportations as well. Threat is not a hard data here, it is hypothtical.

We care about what is mentioned in the passage and what is given in the option.
ansumania wrote:
reply2spg wrote:A is good here. Let's say there are 7,000,000 people travel by air. In that case 700 is just 0.01%

If for each other mode of transportation 100 people are traveling and 7 deaths, then also it is 7%, which is more.

Therefore, A is correct
ru2008 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.


The book reasons that 'E' means more collisions? Can someone please explain why?
hi,

it makes sense that the percentage could be lower. Still, if the absolute no. is increasing, the threat is increasing......
Sudhanshu
(have lot of things to learn from all of you)

Master | Next Rank: 500 Posts
Posts: 292
Joined: Fri Jul 17, 2009 8:39 am
Thanked: 6 times
Followed by:1 members

by pnk » Wed Jul 21, 2010 9:15 pm
ru2008 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. The book reasons that 'E' means more collisions? Can someone please explain why?
Argument is comparing change in dangerousness of air travel over the years (esp with last year). It say more death this year due to air collision than that in last year. With this background, D says - death due to air collision is identical with other mode of transportation. This could mean, this year both air and other mode of transportation are danagerous. It could still be true that air travel this year has more death (and so become less dangerous) than air tarvel last year. So there is no impact on the argument. So D is out.

IMO A