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The contents of a box conists of 14 apples and 23 oranges.

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Intern
Joined: 08 Jan 2007
Posts: 42
The contents of a box conists of 14 apples and 23 oranges. [#permalink]

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16 Feb 2007, 18:28
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The contents of a box conists of 14 apples and 23 oranges. How many oranges must be removed from the box so that 70% of the fruit will be apples?

A 3
B 6
C 14
D 17
E 20

??
Manager
Joined: 12 Sep 2006
Posts: 83

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16 Feb 2007, 18:45
Intern
Joined: 08 Jan 2007
Posts: 42

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16 Feb 2007, 19:06
its 17, but now sure how
Manager
Joined: 12 Sep 2006
Posts: 83

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16 Feb 2007, 19:30
Hey, i correct myself.
Heres how i did it (not sure if its the correct technique)

Let x oranges are removed from the basket. The resultant should be 70 % apples

(37-x)*70/100=14
upon calculating for x, we get 17
Senior Manager
Joined: 12 Mar 2006
Posts: 365
Schools: Kellogg School of Management

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16 Feb 2007, 21:54
let n oranges be removed

14/(14+23-n) = 0.7

25.9 - 0.7n = 14

0.7n = 11.9

n = 17

so D
16 Feb 2007, 21:54
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