confusing question

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naaga: Master | Next Rank: 500 Posts; Posts: 129; Joined: Mon Dec 15, 2008 11:43 pm; Location: Hyderabad; Thanked: 2 times

by naaga » Thu Feb 12, 2009 7:31 am

At a certain diner, a hamburger and coleslaw cost $3.59, and a hamburger and french fries cost $4.40. If french fries cost twice as much as coleslaw, how much do french fries cost?
(A) $0.30
(B) $0.45
(C) $0.60
(D) $0.75
(E) $0.90

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Source: Beat The GMAT — Problem Solving | Thu Feb 12, 2009 7:31 am

dmateer25: Community Manager; Posts: 1049; Joined: Sun Apr 06, 2008 5:15 pmFollowed by: 27 members; Location: Pittsburgh, PA; Thanked: 113 times; GMAT Score:710

by dmateer25 » Thu Feb 12, 2009 8:30 am

Cole = x
Fries = 2x

2x+y=4.40
-X-y =-3.59
___________
x=.81

2(.81) = 1.62

I am coming up with $1.62 for the French fries.

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marcusking: Master | Next Rank: 500 Posts; Posts: 106; Joined: Wed Feb 04, 2009 6:09 am; Location: Louisville, KY; Thanked: 8 times

by marcusking » Thu Feb 12, 2009 8:33 am

I too am getting 1.62 for fries.
4.40 - 3.59 = .81 (difference between fries and cole slaw)

Since fries are twice as much as coleslaw .81*2 = 1.62

I've filled these values in and it works.....

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DanaJ: Site Admin; Posts: 2567; Joined: Thu Jan 01, 2009 10:05 amFollowed by: 550 members; Thanked: 712 times; GMAT Score:770

by DanaJ » Thu Feb 12, 2009 11:08 pm

Man, and I didn't post my answer thinking that maybe I got hit in the head, because I too got the 1.62 answer.

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naaga: Master | Next Rank: 500 Posts; Posts: 129; Joined: Mon Dec 15, 2008 11:43 pm; Location: Hyderabad; Thanked: 2 times

by naaga » Fri Feb 13, 2009 12:31 am

folks , I too got the same answer as you like, but the OA is E, how it could be E ?

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mjjking: Master | Next Rank: 500 Posts; Posts: 353; Joined: Sat Jan 20, 2007 1:29 am; Location: Italy; Thanked: 7 times; GMAT Score:720

by mjjking » Fri Feb 13, 2009 1:42 am

fries = 2 coleslaw

burger + 1/2 fries = 4.40
burger + 1 fries = 3.59

subtract

-1/2 fries = 0.81 => fries 1.82

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