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the average ground delivery

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by sanju09 » Fri Sep 17, 2010 12:58 am
By approximately what percent does the average air delivery cost per pound for a 21-pound parcel exceed the average ground delivery cost per pound for a 28-pound parcel?
(A) 33
(B) 46
(C) 67
(D) 80
(E) 130



[spoiler]Source: https://www.west.net/~stewart/gmat[/spoiler]
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by skalevar » Sun Sep 19, 2010 7:50 am
Shouldn't the third/bottom chart labels say" 10 pounds and over?"

As I read it currently, there is a gap of 10-11 pounds where no price is explicitly mentioned.

Also, there's got to be a trick to this. I did it by writing out all the calculations and it is very time consuming.

D. 67%

Avg price by air = approximately 65 cents
Avg price by ground = approximately 38 cents

% increase = 27 cents / 38 cents (which is under 3/4)

Is that the answer?
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by skalevar » Sun Sep 19, 2010 7:50 am
Correction: 67% is C
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by goyalsau » Sun Sep 19, 2010 9:08 am
skalevar wrote:Shouldn't the third/bottom chart labels say" 10 pounds and over?"

As I read it currently, there is a gap of 10-11 pounds where no price is explicitly mentioned.

Also, there's got to be a trick to this. I did it by writing out all the calculations and it is very time consuming.

D. 67%

Avg price by air = approximately 65 cents
Avg price by ground = approximately 38 cents

% increase = 27 cents / 38 cents (which is under 3/4)

Is that the answer?
completely agree with you,
there must be some way to solve it in limited time.
,No way i will be able to solve it in 2 minutes and what's the worst part is i try to solve it and in the end will give it some extra time than the usual 2 minutes and not be able to answer one easy one.
experts comments..on this..
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