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# At the post office Louis bought 50 stamps, each of which was

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Manager
Joined: 12 Oct 2008
Posts: 104

Kudos [?]: 10 [0], given: 0

At the post office Louis bought 50 stamps, each of which was [#permalink]

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24 Oct 2008, 07:52
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At the post office Louis bought 50 stamps, each of which was either a 20-cent or 25-cent stamp. How many of the stamps were 25-cent stamps?
(1) He spent a total \$11.00 for the stamps
(2) He bought 1,5 times as many 20-cent stamps as 25-cent stamps

Kudos [?]: 10 [0], given: 0

Intern
Status: 4th attempt taking the GMAT
Joined: 20 Sep 2008
Posts: 15

Kudos [?]: 1 [0], given: 0

Location: Chapel Hill
Schools: Fuqua
Re: DS stamps [#permalink]

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24 Oct 2008, 08:11
I got D
x= 20cent stamps
y=25 cent stamps
x+y=50
From Stamt 1
.20x+.25y=11
2 equations sufficient
From Stamt 2
(I really didn't understand "he got 1")
5x=y
2 equations sufficient
whats the OA?

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Intern
Joined: 21 Aug 2008
Posts: 24

Kudos [?]: 19 [0], given: 0

Re: DS stamps [#permalink]

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24 Oct 2008, 10:13
Quote:
At the post office Louis bought 50 stamps, each of which was either a 20-cent or 25-cent stamp. How many of the stamps were 25-cent stamps?
(1) He spent a total \$11.00 for the stamps
(2) He bought 1,5 times as many 20-cent stamps as 25-cent stamps

EDIT

D, either one is sufficient

Kudos [?]: 19 [0], given: 0

Re: DS stamps   [#permalink] 24 Oct 2008, 10:13
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# At the post office Louis bought 50 stamps, each of which was

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