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Sue planted 4 times as many apple seeds as she planted orang

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Sue planted 4 times as many apple seeds as she planted orang [#permalink] New post 04 Dec 2017, 04:57
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Sue planted 4 times as many apple seeds as she planted orange seeds. 15 percent of the apple seeds grew into trees, and 10 percent of the orange seeds grew into trees. If a total of 420 apple trees and orange trees grew from the seeds, how many orange seeds did Sue plant?

A. 540
B. 600
C. 660
D. 720
E. 760

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Re: Sue planted 4 times as many apple seeds as she planted orang [#permalink] New post 04 Dec 2017, 21:34
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Bunuel wrote:
Sue planted 4 times as many apple seeds as she planted orange seeds. 15 percent of the apple seeds grew into trees, and 10 percent of the orange seeds grew into trees. If a total of 420 apple trees and orange trees grew from the seeds, how many orange seeds did Sue plant?

A. 540
B. 600
C. 660
D. 720
E. 760



Here,

No let orange be = x

therefore no. of Apple = 4x (as given)

or

0.15 (4x) + 0.1 x =420

or 0.6x + 0.1x = 420

or x = 600 oranges.
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Re: Sue planted 4 times as many apple seeds as she planted orang   [#permalink] 04 Dec 2017, 21:34
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Sue planted 4 times as many apple seeds as she planted orang

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