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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 dol [#permalink]

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New post 19 Aug 2017, 11:16
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.


I have only one question on this one. I'm going to rewrite the portion of the stimulus that confuses me...

"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"

Now please help me with this confusion..

What is this amount that we're talking about?
Is it

A. The entire total of all the resident travellers combined?
or
B. The entire total of one resident traveller's transportation expense?

Although, if it were clearly written that "transportation expenses on average for residents", then it would definitely be B. But how do we differentiate? will "on average" always be explicitly stated when it is meant to?
Experts, please help on this. IanStewart mikemcgarry
your help is really appreciated.
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Re: Transportation expenses accounted for a large portion of the total dol [#permalink]

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New post 19 Aug 2017, 14:49
ShashankDave 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"

Now please help me with this confusion..

What is this amount that we're talking about?


The question talks about "the total amount spent by residents". That has to mean the total amount, because "residents" is pluralized. If instead it meant the amount per person, there would be a few ways to convey that - it could say 'per person', or use the word 'average', or talk about the amount spent by 'each resident' (and there are surely other ways that aren't occurring to me right now).

But the distinction you're asking about doesn't matter in this question, because we're just concerned with the fraction of holiday expenses that are spent on transportation. It won't matter if you measure that by taking the sum total of all expenses, or by looking at expenses per person; you'll get the same result. If people spent $H in total on holidays, and $T in total on transportation, then T/H is the fraction of holiday expenses spent on transportation. If you have n people in total, then on average each person spent $H/n on holidays, and $T/n on transportation, so the fraction the average person spent on transportation was (T/n)/(H/n) = T/H, so is the same as what we found using the sum totals.
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Re: Transportation expenses accounted for a large portion of the total dol [#permalink]

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New post 20 Aug 2017, 01:42
What is the OA here ?

Looks like D imo

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Re: Transportation expenses accounted for a large portion of the total dol [#permalink]

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New post 20 Aug 2017, 11:36
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.

Type - inference
Boil it down - Half of the total dollar amount spent on the transportation was airfare . 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.

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 - the argument gives no information about unavailability of other means of transportations
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. - Incorrect- we do not have any information on cost per mile traveled
D) Overall, people who did not travel by airplane had lower average transportation expenses than people who did. - Correct - majority for people accounted for half of total dollar amount spent on transportation
E) Those who traveled by airplane spent about as much, on average, on other means of transportation as they did on airfare. - Incorrect - may be true but need not be true

Answer D
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Re: Transportation expenses accounted for a large portion of the total dol [#permalink]

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New post 05 Sep 2017, 13:56
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I chosed D over C because the prompt is only concerned with dollar amounts spend on means of transportation but does not indicate how many miles people actually traveled for the dollar amount they spend.
Let's imagine that the majority of residents who traveled by train or car and spend less money on means of transportation traveled (relatively short distances) within the US, and residents who traveled by airplane did so to go i.e. to Europe. If we spread airfare costs over the number of miles traveled from the US to Europe and compare it to the average cost per mile for a shorter trip by car / train within the US, cost per mile for airfare is probably the same or less than cost per mile for other means of transportation.

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Re: Transportation expenses accounted for a large portion of the total dol   [#permalink] 05 Sep 2017, 13:56

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