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CR- MASS TRANSIT

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Senior Manager
Joined: 11 Nov 2003
Posts: 356
Location: Illinois

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06 Aug 2004, 07:37
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GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4288

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06 Aug 2004, 08:23
It's b/w A and C but I'll go with C
D and E just cannot be inferred
C is most conservative answer. Stem says "because the price of gasoline is still not prohibitive, the number of passengers using PT has fallen". This means that at a certain treshold, when gasoline prices are prohibitive, PT passengers will automatically rise. A assumes a directly proportional increase in PT passengers while the function might be one that starts increasing after a certain treshold as said by the stem.
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Paul

Senior Manager
Joined: 11 Nov 2003
Posts: 356
Location: Illinois

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06 Aug 2004, 09:32
Paul wrote:
It's b/w A and C but I'll go with C
D and E just cannot be inferred
C is most conservative answer. Stem says "because the price of gasoline is still not prohibitive, the number of passengers using PT has fallen". This means that at a certain treshold, when gasoline prices are prohibitive, PT passengers will automatically rise. A assumes a directly proportional increase in PT passengers while the function might be one that starts increasing after a certain treshold as said by the stem.

But if even if the price of gasoline becomes prohibitive, how can we say for sure that the number of passangers on train will rise? It may be possible that because of the further deterioration in other services on train, the ridership may further decline or it may remain constant. How can we make the price of the gasiline the sole criteria for increase or decrease in the ridership?
GMAT Club Legend
Joined: 15 Dec 2003
Posts: 4288

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06 Aug 2004, 09:58
It is not the sole criterion which will increase ridership. However, it will be one of them. Hence, if it is one of the factors, holding all other factors constant, it then must increase ridership.

The stem says that, compounded to other reasons, since gas prices did not reach that prohibitive level, ridership has fallen. I believe that we can safely say that if gas prices reach that level, people should switch to public transports and increase its ridership.
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Paul

SVP
Joined: 16 Oct 2003
Posts: 1801

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09 Aug 2004, 09:13
Yes Got C. I had a bad weekend with lots of CR's getting wrong so I am taking little more time to get back my confidence.
Senior Manager
Joined: 25 Jul 2004
Posts: 273

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09 Aug 2004, 13:29
since gas prices have not reached prohibitive levels, mass transport decreasing

MTD -> NOT Gas Reached prohibitive levels

Contrapositive is:

Gas Reaches Prohibitive levels -> NOT MTD (C)
Director
Joined: 13 Nov 2003
Posts: 960
Location: Florida

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09 Aug 2004, 18:19
the whole paragraph is based on the fact that:
gas price below prohibitive level --> people will switch to their own transport.

C my choice.
09 Aug 2004, 18:19
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