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A certain NYC taxi driver has decided to start charging a

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VP
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Joined: 30 Jun 2008
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A certain NYC taxi driver has decided to start charging a [#permalink] New post 29 Oct 2008, 05:29
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

45% (01:50) correct 55% (00:33) wrong based on 84 sessions
A certain NYC taxi driver has decided to start charging a rate of r cents per person per mile. How much, in dollars, would it cost 3 people to travel x miles if he decides to give them a 50% discount?

A. 3xr/2
B. 3x/200r
C. 3r/200x
D. 3xr/200
E. xr/600
[Reveal] Spoiler: OA

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Senior Manager
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Re: PS : NYC Taxi Driver [#permalink] New post 29 Oct 2008, 05:36
D

Almost stepped into the trap :)

3xr/2 is in cents - 3xr/200 dollars
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Re: PS : NYC Taxi Driver [#permalink] New post 29 Oct 2008, 05:38
r/100 dollars per person per mile

one person going x miles will be charged rx/100
50% discount = rx/200

3such people = 3rx/200
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Re: PS : NYC Taxi Driver [#permalink] New post 29 Oct 2008, 05:42
rate*miles*passangers/discount

discount has to be in dollars so 1/2/100/1=200

rx3/200

D
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Re: PS : NYC Taxi Driver [#permalink] New post 29 Oct 2008, 07:01
OA is D.

I picked up A :( fell into the trap
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Re: PS : NYC Taxi Driver   [#permalink] 29 Oct 2008, 07:01
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3 Experts publish their posts in the topic A certain taxi company charges $3.10 for the first 1/5 of a goodglory 15 04 Dec 2007, 19:37
A certain NYC taxi driver has decided to start charging a alimad 3 20 Nov 2007, 06:27
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A certain NYC taxi driver has decided to start charging a

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