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What am I missing here?

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Source: — Data Sufficiency |
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Re: What am I missing here?

by deepoe » Mon Feb 16, 2009 2:35 am
dsheppard wrote:Data Sufficiency:

Is X < Y ?

1) 2x < 3y

2) xy > 0

Please advise!

Thx -
1) Is sufficient, It shows if 3 * Y = something it will be greater than X.

2) Is not sufficient because it does not give you information about the X and Y if the one is greather or not.

If I'm wrong, correct me please :D
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Re: What am I missing here?

by Maratha1 » Mon Feb 16, 2009 5:45 am
deepoe wrote:
dsheppard wrote:Data Sufficiency:

Is X < Y ?

1) 2x < 3y

2) xy > 0

Please advise!

Thx -
1) Is sufficient, It shows if 3 * Y = something it will be greater than X.

2) Is not sufficient because it does not give you information about the X and Y if the one is greather or not.

If I'm wrong, correct me please :D
I concur with the above post. Answer should be A. Can you please tell what is OA?
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by deepoe » Mon Feb 16, 2009 6:06 am
Jep A
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by DanaJ » Mon Feb 16, 2009 6:19 am
Guys what if y = 1.5 and x = 2? Then you get that 3y = 4.5 is greater than 4 = 2x, but y is smaller than x. On the other hand, take x = 2 and y = 3. 3y = 9 will surely be greater than 2x = 4, but this time y is greater than x.
IMHO it's E.
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by Maratha1 » Mon Feb 16, 2009 6:38 am
DanaJ wrote:Guys what if y = 1.5 and x = 2? Then you get that 3y = 4.5 is greater than 4 = 2x, but y is smaller than x. On the other hand, take x = 2 and y = 3. 3y = 9 will surely be greater than 2x = 4, but this time y is greater than x.
IMHO it's E.
Very good point! I am really tired of my such mistakes. I dont know how can I get rid of my such mistakes... :cry:
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by moorthy76 » Mon Feb 16, 2009 6:56 am
IMO E:

A : We do not know if x and y are positive or negative - insufficient

B: We know both are either positive or negative. But nothing more - insufficient

C: When we combine, there is no definite answer - insufficient.

Hence E..
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by dsheppard » Mon Feb 16, 2009 7:43 am
This question was on the GMAC practice Prep Test... I chose answer E and I got it wrong...I believe it said the correct answer was C..

Has anyone ever had problems with the Prep Test getting questions wrong that were actually right? This happened a few times during one of my tests???
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by DanaJ » Mon Feb 16, 2009 7:46 am
IMHO if this is the case then you must have mistakingly copied stmt 2. If xy < 0, then C would be the answer. I think you should double check.
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by dsheppard » Mon Feb 16, 2009 8:12 am
I didn't copy the question wrong but I'm not positive what the correct answer was...I chose E and it said I was wrong...That's all I'm sure of...
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by gmat740 » Mon Feb 16, 2009 11:42 pm
Hello Friends,
I think the correct answer should be E
there is no scope for C
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by Alpturk » Thu Feb 19, 2009 9:06 am
Data Sufficiency:

Is X < Y ?

1) 2x < 3y

2) xy > 0

correct answer is c.
lets assume for 2 statement. both x and y must be negative or positive.
if x and y were negative, x<y cuz lets say x is -4 and y is -2.
so x<y.
the second option is that x and y are positive.
lets say x is 4 and y is 5. this provides equation of 2x< 3y. ( 8<15)
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by masuarezdl » Thu Feb 19, 2009 7:17 pm
I believe the correct answer is E.

Statement 1: In other words, it says that x<1.5y. Whether x is greater than y we dont know, because the range from 1.01 to 1.49 is not known. For example, if x=1.01 and y=0.67, then x=y. If x=1 and y=0.67 then x<y.

Statement 2: It can only be implied that x and y are either positive or negative. This is not sufficient, and does not help at all.

Answer is E.
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