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If wx=y, what is the value of xy? 1. w*x^2 = 16 2. y=4

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If wx=y, what is the value of xy? 1. w*x^2 = 16 2. y=4 [#permalink] New post 18 Jun 2006, 15:48
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If wx=y, what is the value of xy?

1. w*x^2 = 16
2. y=4

Please explain your answer.
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Re: GMAT Prep DS [#permalink] New post 18 Jun 2006, 17:17
kuristar wrote:
If wx=y, what is the value of xy?

1. w*x^2 = 16
2. y=4

A.
st 1, w*x^2 = 16
w * x * x = 16
x * y (since wx = y) = 16. sufficient

st 2. y = 4. nsf..
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 [#permalink] New post 18 Jun 2006, 19:32
agree with A.

in stmt 2 ,

w x y

2 2 4 xy =8

4 1 4 xy=4
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 [#permalink] New post 18 Jun 2006, 19:40
St1:
w(x^2) = 16
wx(x) = 16
y(x) = 16 --> Sufficient.

St2:
Insufficient.

Ans A
  [#permalink] 18 Jun 2006, 19:40
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If wx=y, what is the value of xy? 1. w*x^2 = 16 2. y=4

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