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To mail a package , the rate is X cents for the first pound

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Manager
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To mail a package , the rate is X cents for the first pound [#permalink] New post 20 Jan 2008, 09:31
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100% (01:38) correct 0% (00:00) wrong based on 5 sessions
To mail a package , the rate is X cents for the first pound and Y cents for an additional pound, where X>Y. Two packages weighing 3 pounds and 5 pounds, respectively, can be mailed separately or combined as one package. Which method id cheaper, and how much money is saved?

A. combines, with a saving of X-Y cents
B. combined, witha saving of Y-X cents.
C. combined with a sving of X cents.
D. separately, with a saving of X-Y cents.
E. separately, with a saving of Y cents.



-thanx
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Re: PS - mail [#permalink] New post 20 Jan 2008, 10:54
obviously A. the only difference is paying for the first pound of the second package. if it's included with the first one, its price is Y, if mailed separately X. Then the difference is X-Y.
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Re: PS - mail [#permalink] New post 20 Jan 2008, 18:35
agree with A. I just did the math on paper.

separately, you have one pkg costing X+2Y, and the other costs X+4Y. Together, thats 2X+6Y.

Together, the cost is X+7Y. The difference btwn the two options ix X-Y.
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Re: To mail a package , the rate is X cents for the first pound [#permalink] New post 21 Nov 2011, 12:19
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Another way of solving this problem is using numbers in place of x and y
choose x = 3 and y = 2 as x>y

Shipping separately :
3 lb Package: 3 + 2 *2 = 7
5 lb package: 3 + 4*2 = 11
Total cost: 18 lbs

Shipping combined:
Cost = 3 + 7 * 2 = 17 lbs

So shipping combined is cheaper it is cheaper by 1cent(i.e 3-2 or x-y)

Looking at the answer choices - A
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Re: To mail a package , the rate is X cents for the first pound [#permalink] New post 21 Nov 2011, 13:05
@icaniwill - thanks for alternate solution
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Re: To mail a package , the rate is X cents for the first pound [#permalink] New post 21 Nov 2011, 13:35
A, try pluging in strategy and you will see that A is our man :)

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Re: To mail a package , the rate is X cents for the first pound   [#permalink] 21 Nov 2011, 13:35
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To mail a package , the rate is X cents for the first pound

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