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Transportation expenses accounted for a large portion of the total dol

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Transportation expenses accounted for a large portion of the total dollar amount spent on trips for pleasure by residents of the United States in 1997, and about half of the total dollar amount spent on the transportation was airfare. However, the large majority of United States residents who took trips for pleasure in 1997 did not travel by airplane but used other means of transportation.

If the statements above are true, which of the following must also be true about United States residents who took trips for pleasure in 1997?

A) Most of those who traveled by airplane did so because the airfare to their destination was lower than the cost of other available means of transportation.
B) Most of those who traveled by airplane did so because other means of transportation to their destinations were unavailable.
C) Per mile traveled, those who traveled by airplane tended to spend more on transportation to their destination than did those who used other means of transportation.
D) Overall, people who did not travel by airplane had lower average transportation expenses than people who did.
E) Those who traveled by airplane spent about as much, on average, on other means of transportation as they did on airfare.
[Reveal] Spoiler: OA

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New post 18 Jun 2016, 12:21
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why D?
I guess the answer should be B

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Assume that the total US transportation expense is $100. Now the questions says, a large portion, lets say $60 was spent on trips for pleasure by residents of the United States and about half, $50 was spent on airfare. Now the discrepancy is that the large majority of United States residents who took trips for pleasure in 1997 did not travel by airplane but used other means of transportation.

Lets assume 10 people took trips for pleasure. A large majority, lets say 6, did not travel by airplane.

Travel expense for 6 people who did not travel by airplane = (60 - 50) = $10
Travel expense for 4 people who travelled by airplane = $50

Hence, average money spent on travel by people who DID NOT travel by airplane is less that those who did.

Hence D.
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AbdurRakib wrote:
Transportation expenses accounted for a large portion of the total dollar amount spent on trips for pleasure by residents of the United States in 1997, and about half of the total dollar amount spent on the transportation was airfare. However, the large majority of United States residents who took trips for pleasure in 1997 did not travel by airplane but used other means of transportation.

If the statements above are true, which of the following must also be true about United States residents who took trips for pleasure in 1997?

A) Most of those who traveled by airplane did so because the airfare to their destination was lower than the cost of other available means of transportation.
B) Most of those who traveled by airplane did so because other means of transportation to their destinations were unavailable.
C) Per mile traveled, those who traveled by airplane tended to spend more on transportation to their destination than did those who used other means of transportation.
D) Overall, people who did not travel by airplane had lower average transportation expenses than people who did.
E) Those who traveled by airplane spent about as much, on average, on other means of transportation as they did on airfare.


Read choices A,B & C and thought C is the best one.

But clearly D is more apt than C.
Never neglect any choices in SC directly w/o even reading it for once.Only go by POE.

Lesson Learnt.

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New post 19 Jun 2016, 00:48
Quant-Verbal crossover. Tricky! :wink:

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New post 19 Jun 2016, 11:12
can someone elaborate why C is wrong?

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New post 19 Jun 2016, 16:54
goforgmat wrote:
can someone elaborate why C is wrong?


Why would you think it is right?

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New post 19 Jun 2016, 19:40
Can somebody explain why C option is wrong.What i could gather was that since per mile cost of air travel was high so the cost of airfare is high even when smaller share of people used air travel

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New post 19 Jun 2016, 20:40
please tell me why it is not c as d is more alike of c and i thought it should be c bcz it gives more clear and accurate picture than the avg would do.

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bhamini1 wrote:
Can somebody explain why C option is wrong.What i could gather was that since per mile cost of air travel was high so the cost of airfare is high even when smaller share of people used air travel



In the argument it is given that total dollar amount spent on airfare was more.
Now total dollar amount for airfare = Avg cost of airfare * number of passengers.

It is given that number of passengers for air travel were less than the number of passenger travelling by other means.

So to keep the expenditure in airfare equal to that in other fares, we have to increase the avg cost of airfare.

In option C, per mile cost is not a proper factor because the miles traveled in any mode of transportation is not given.
eg if the total miles traveled in air were significantly less than those traveled in other modes, then Avg cost of air (= tot miles * cost per mile) would be comparatively less and the total dollar amount for air would decrease and the argument won't hold true.

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Sonalika42 wrote:
why D?
I guess the answer should be B


Hi Sonalika,

B says : B) Most of those who traveled by airplane did so because other means of transportation to their destinations were unavailable , there is no text in the passage which talks about the mode of transportation being available or not

D is the most logical answer , ? 50% of all expenses is on airfare m hence those who did not use airfare had less expense that those using airfare since they did not pay this bulk amount at all
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first information:-
total $ spend on pleasure trip by residents says 100$
second information:-
large portion of this amount is for transportation says 60$
third info:-
half of transportation cost is airfare says 30$ , equal to other means of trans.
Forth :- Residents who took trips for pleasure say 10 people
large portion did not use air-plane says 6 people did not use it. so 4 people use it.

Lets check D first avg cost for airfare 30/4 = more than 7 and avg cost for other tran 30/6 = 5 ... so correct answer
Lets check other answers
Both A and B give us reason why people travelled by some mode or why people not travelled by other mode.
C , with information above , we dont know how much travelling anybody has done, so we cannot tell per mile.
E cannot be the answer.

Please let me know if looks good and do let me know if my reasoning is wrong

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New post 26 Jun 2016, 07:00
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Same expenses, more people means lower expense per person.

Answer choice D.
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Okay, I got this wrong initially but on a closer look D makes complete sense.

Before we jump in to analyze the answers, lets focus on what the passage is saying:

-Transport expenses accounted for large portion of money spent in 1997 pleasure trips.
-Half of the transport expenses was just airfare.
-BUT majority of folks did not take airplanes
This means --> air travel had less number of passengers than other means of transport, but ended up being about half of the total transport cost.

Simplified -- airfare costs = half of total transportation costs.
airfare passengers = minority of passengers (since majority did NOT use air travel)

Now analysis of answer choices:

A. Not given, we dont know why anyone did or did not take airplane. WRONG
B. Again, not given in passage. Same as A. WRONG
C. yet again, NOT GIVEN. we dont know HOW MANY MILES people traveled. We just know what method they used airplane vs others. WRONG.
D. Yes, this makes sense. Why? Look above where i deconstructed what the passage gave --> airfare costs = half of total transportation costs, BUT airfare passengers = minority of passengers (since majority did NOT use air travel). half the cost and less than half the people? Clearly, airfare is more expensive. Making other forms of transport LESS expensive CORRECT
E. (i originally chose this cuz i did not understand what the passage intended to say) We have no idea about the money spent by people on other transports along with airfare. we only know that there were some who took airplanes and majority of people who didnt. WRONG

and there we have it. Hope this helps!

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New post 06 Jul 2016, 14:07
excellent question!

clearly C is the trap as it is not known the miles for the destinations. D however will do just fine with overall = avg cost * number of people.

D is the right answer!

How long did it take you guys to solve this one? Mine was 3 minutes

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Transportation expenses accounted for a large portion of the total dollar amount spent on trips for pleasure by residents of the United States in 1997, and about half of the total dollar amount spent on the transportation was airfare. However, the large majority of United States residents who took trips for pleasure in 1997 did not travel by airplane but used other means of transportation.

If the statements above are true, which of the following must also be true about United States residents who took trips for pleasure in 1997?

A) Most of those who traveled by airplane did so because the airfare to their destination was lower than the cost of other available means of transportation.
--> out of scope.

B) Most of those who traveled by airplane did so because other means of transportation to their destinations were unavailable.
--> out of scope.

C) Per mile traveled, those who traveled by airplane tended to spend more on transportation to their destination than did those who used other means of transportation.
--> we do not information about the number of miles.

D) Overall, people who did not travel by airplane had lower average transportation expenses than people who did.
--> correct.

E) Those who traveled by airplane spent about as much, on average, on other means of transportation as they did on airfare.
--> we have no information about "other means of transportation".
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New post 10 Jun 2017, 01:10
Hi ,

Doing simple math in this q can solve the q easily.
Lets assume 100 $ was spent by ppl who took trips for pleasure. In this a majority of dollar amnt was spent on transportation , lets assume 60$.

We are then given that on a total of 60$ spent in transporatation abt half was spent on airfare ie 30$.

Lets also assume taht 10 ppl took the trips for pleasure, out of which 6 (a majority of them) took other means of transportation and 4 took airfare.

Now, we can calculate avg spent by the 2 grps :
Avg dollar spent by grp who took other means of transport = 30/6 = 55
Avg dollar spent by grp who took airplane = 30/4 =7.5

hence D

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New post 17 Jun 2017, 10:16
I notice people using math to solve this CR problem. While this might be effective, it may also be time consuming. The gist of the problem is to resolve the paradox of why airfare accounts for half of money spent despite being used by fewer people. Well, the answer can only be that airfare is, in general, more expensive than other means of transportation and this is what the OA (D) is saying and reality also supports that. Option C is talking about per mile, this is simply out of scope of the passage.

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New post 25 Jul 2017, 05:06
Sonalika42 wrote:
why D?
I guess the answer should be B


You are missing the an important point here. The given Question is an Inference Question.
And for Inference Q- The first thing to keep in mind is :-
a. Is the answer 'explicitly' stated in the provided passage (or is it a piecemeal paraphrase of the statements) ?
b. Can the answer be 'explicitly' derived / solved from the given information (like a math problem).

What you did with B is that , you tried using common sense logic of inference (this is deduction like Sherlock : ) not GMAT inference ).
D can be mathematically calculated, if you check it.

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New post 25 Jul 2017, 08:55
Imo D
A very good question .
C is very tricky but we can eliminate it as we do not know how many mile passengers in each category traveled .
It might so happen that people who traveled by other means of transportation other than airplane end up spending more because their miles traveled were much more than the miles traveled by the people who traveled by airplane.
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Re: Transportation expenses accounted for a large portion of the total dol   [#permalink] 25 Jul 2017, 08:55

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