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value of p

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Source: — Data Sufficiency |
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Re: value of p

by bluementor » Fri May 15, 2009 3:47 am
PAB2706 wrote:What is the value of p

1) p=4q

2) q=4p
Both statements are individual on their own because each have a 2nd variable q, which is unknown.

Both statements together:
p = 4q
p = 4(4p)
p = 16p
16p - p = 0
15p = 0

so p must be 0. Sufficient.

Choose C.

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by aj5105 » Fri May 15, 2009 4:27 am
Yup, (C)

(1) + (2)

p = 4 * 4p

p = 16p

15p = 0

p = 0
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