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m02 # 15

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Intern
Joined: 18 Feb 2010
Posts: 28
Followers: 1

Kudos [?]: 60 [1] , given: 5

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03 Feb 2012, 20:41
1
KUDOS
Is $$\frac{p}{q} \gt \frac{r^2}{s}$$ ?

1. $$\frac{p}{q} \gt \frac{r}{s}$$
2. $$r = 1$$

* Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient
* Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient
* BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
* EACH statement ALONE is sufficient
* Statements (1) and (2) TOGETHER are NOT sufficient

I can understand that if r=1, the answer to the question is yes. But I am not sure how r<1 would also give the same answer i.e. (C).

Thanks
Math Expert
Joined: 02 Sep 2009
Posts: 35326
Followers: 6649

Kudos [?]: 85877 [0], given: 10256

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04 Feb 2012, 10:37
Is $$\frac{p}{q} \gt \frac{r^2}{s}$$ ?

1. $$\frac{p}{q} \gt \frac{r}{s}$$
2. $$r = 1$$

* Statement (1) ALONE is sufficient, but Statement (2) ALONE is not sufficient
* Statement (2) ALONE is sufficient, but Statement (1) ALONE is not sufficient
* BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient
* EACH statement ALONE is sufficient
* Statements (1) and (2) TOGETHER are NOT sufficient

I can understand that if r=1, the answer to the question is yes. But I am not sure how r<1 would also give the same answer i.e. (C).

Thanks

Answer is indeed C. But saying that if (2) were r<=1 we would still have C is wrong.

Consider: p/q=3 and z=1 for (1)+(2). If r=1 then the answer would be YES: 3>1 but if r=-2 then the answer would be NO: 3<(-2)^2=4.
_________________
Intern
Joined: 18 Feb 2010
Posts: 28
Followers: 1

Kudos [?]: 60 [0], given: 5

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04 Feb 2012, 20:14
Thanks Bunnuel! That is exactly what I felt, if r<1 it may not hold true. But the explanation given in the answers in the m02 question set said that if r<=1 , then p/q > r^2/S should be true. Thanks again!
Re: m02 # 15   [#permalink] 04 Feb 2012, 20:14
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m02 # 15

Moderator: Bunuel

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