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The weight of a glass of jar is 20% of the weight of the jar

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The weight of a glass of jar is 20% of the weight of the jar [#permalink] New post 25 Nov 2012, 03:42
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62% (02:11) correct 37% (00:00) wrong based on 1 sessions
The weight of a glass of jar is 20% of the weight of the jar filled with coffee beans. After some of the beans have been removed, the weight of the jar and the remaining beans is 60% of the original total weight. What fraction part of the beans remain in the jar?

A. 1/5
B. 1/3
C. 2/5
D. 1/2
E. 2/3
[Reveal] Spoiler: OA
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Re: The weight of a glass of jar is 20% of the weight of ... [#permalink] New post 25 Nov 2012, 04:25
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cv3t3l1na wrote:
The weight of a glass of jar is 20% of the weight of the jar filled with coffee beans. After some of the beans have been removed, the weight of the jar and the remaining beans is 60% of the original total weight. What fraction part of the beans remain in the jar?
a.1/5
b.1/3
c.2/5
d.1/2
e.2/3


Somebody to suggest a way to solve this problem?


Let weight of jar filled with beans = 100 g
Weight of jar = 20 g
Weight of coffee beans = 80 g
Weight of jar and remaining beans = 60 g
Weight of remaining beans = 40 g

Fraction remaining = 40/80 = 1/2

Answer is D.

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Re: The weight of a glass of jar is 20% of the weight of ...   [#permalink] 25 Nov 2012, 04:25
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