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Tricky#1

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Tricky#1 [#permalink]

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New post 13 Apr 2009, 02:27
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The average of x, y, and z is one-third greater than x. The sum y + z is what percent greater than x?

A) 50

B) 100

C) 200

D) 300

E) 400
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Re: Tricky#1 [#permalink]

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New post 13 Apr 2009, 02:43
nitya34 wrote:
The average of x, y, and z is one-third greater than x. The sum y + z is what percent greater than x?

A) 50

B) 100

C) 200

D) 300

E) 400


(x+y+z)/3 = 4/3*x ->y+z=3x, so y+z =300% of x

D
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New post 13 Apr 2009, 02:54
Since the question is asking "The sum y + z is what percent greater than x?"

The answer should be 200% since 3x is 200% greater than x.

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Re: Tricky#1 [#permalink]

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New post 13 Apr 2009, 03:00
DaveGG wrote:
Since the question is asking "The sum y + z is what percent greater than x?"

The answer should be 200% since 3x is 200% greater than x.


You are right! I like this kind of trap. :-D Thanks
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Re: Tricky#1   [#permalink] 13 Apr 2009, 03:00
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