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3 people to travel x miles

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by sanju09 » Fri Mar 04, 2011 2:00 am
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) 3 x r/2
(B) 3 x/ (200 r)
(C) 3 r/ (200 x)
(D) 3 x r/200
(E) x r/600
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by Anurag@Gurome » Fri Mar 04, 2011 2:25 am
sanju09 wrote: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) 3 x r/2
(B) 3 x/ (200 r)
(C) 3 r/ (200 x)
(D) 3 x r/200
(E) x r/600
Without discount the cost, C = 3xr cents = 3xr/100 dollars

After 50% discount, the cost, D = C/2 = 3xr/200 dollars

The correct answer is D.
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