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# Joe bought only $0.20 stamps and$0.30 stamps. How many

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Manager
Joined: 04 Apr 2010
Posts: 89
Schools: UCLA Anderson
Followers: 2

Kudos [?]: 53 [0], given: 17

Joe bought only $0.20 stamps and$0.30 stamps. How many [#permalink]

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15 Jun 2010, 17:29
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Joe bought only $0.20 stamps and$0.30 stamps. How many $0.20 stamps did he buy? (1) Joe bought an equal number of$0.20 stamps and $0.30 stamps. (2) Joe bought a total of$2.50 worth of stamps.
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Senior Manager
Joined: 19 Nov 2009
Posts: 322
Followers: 5

Kudos [?]: 92 [0], given: 44

Re: twenty cent and thirty cent stamps... [#permalink]

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15 Jun 2010, 18:24
C.

Let x be the no. of $0.20 stamps and y be the number of$0.30 stamps

St. 1 : Insufficient - Total no. of stamps is unknown
St. 2 : Insufficient - 0.2x + 0.3y = 2.50. The possible values of (x,y) include (5,5), (8,3), (11,1)

St. 1 & 2 : Sufficient - x = y and 0.2x + 0.3y = 2.50. hence, x=y=5.
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Intern
Joined: 03 Apr 2016
Posts: 20
Followers: 2

Kudos [?]: 7 [0], given: 1219

Re: Joe bought only $0.20 stamps and$0.30 stamps. How many [#permalink]

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28 May 2016, 08:35
Re: Joe bought only $0.20 stamps and$0.30 stamps. How many   [#permalink] 28 May 2016, 08:35
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# Joe bought only $0.20 stamps and$0.30 stamps. How many

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