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A rabbit on a controlled diet is fed daily 300 grams of a

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Manager
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Joined: 10 Jul 2015
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GMAT 1: 770 Q47 V48
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A rabbit on a controlled diet is fed daily 300 grams of a [#permalink]

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New post 26 Mar 2016, 18:25
Here is a visual that should help.
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Screen Shot 2016-03-26 at 6.26.43 PM.png
Screen Shot 2016-03-26 at 6.26.43 PM.png [ 108.49 KiB | Viewed 173 times ]

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Re: A rabbit on a controlled diet is fed daily 300 grams of a [#permalink]

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New post 23 May 2016, 12:29
The answer choices are wide enough to narrow down. Food X < average, therefore options C to D are out. Can't be 100 because it is to far away from the average, hence B.

tinman1412 wrote:
A rabbit on a controlled diet is fed daily 300 grams of a mixture of two foods, food X and food Y. Food X contains 10% protein and food Y contains 15% protein. If the rabbit's diet provides exactly 38 grams of protein daily, how many grams of food X are in the mixture.

A. 100
B. 140
C. 150
D. 160
E. 200
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Re: A rabbit on a controlled diet is fed daily 300 grams of a [#permalink]

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New post 23 May 2016, 12:52
\(.1x+.15(300-x)=38\)

\(10x+4500-15x=3800\)

\(5x=700\)

\(x=140\)
Re: A rabbit on a controlled diet is fed daily 300 grams of a   [#permalink] 23 May 2016, 12:52

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A rabbit on a controlled diet is fed daily 300 grams of a

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