It is currently 22 Oct 2017, 03:58
My Tests

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

xy ≠ 0

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Moderator
Moderator
User avatar
Joined: 18 Apr 2015
Posts: 2147
Followers: 30

Kudos [?]: 309 [0], given: 1272

xy ≠ 0 [#permalink] New post 24 May 2017, 01:24
Expert's post
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions



xy ≠ 0

\frac{a}{xs}=632 and \frac{a}{ys}=158
Quantity A
Quantity B
x
y


A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
[Reveal] Spoiler: OA

_________________

Get the 17 FREE GREPrepclub Tests

Senior Manager
Senior Manager
Joined: 03 Sep 2017
Posts: 401
Followers: 0

Kudos [?]: 110 [0], given: 64

Re: xy ≠ 0 [#permalink] New post 10 Oct 2017, 08:48
We can derive the expression of x and y from the information we have and we get x = \frac{a}{632*s} and y = \frac{a}{158*s}. Then, I would simplify the two expressions multiplying by s/a to get x = \frac{1}{632} and y = \frac{1}{158} and I would say B is greater. However the answer is D. How is it possible?
Intern
Intern
Joined: 27 Jul 2017
Posts: 1
Followers: 0

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

Re: xy ≠ 0 [#permalink] New post 10 Oct 2017, 10:06
IlCreatore wrote:
We can derive the expression of x and y from the information we have and we get x = \frac{a}{632*s} and y = \frac{a}{158*s}. Then, I would simplify the two expressions multiplying by s/a to get x = \frac{1}{632} and y = \frac{1}{158} and I would say B is greater. However the answer is D. How is it possible?


S/a either (+) or (-), your case considered it only (+)value but if you go with (-) will get A is greater so that D is the right ans.
Manager
Manager
Joined: 20 Apr 2016
Posts: 209
Followers: 1

Kudos [?]: 121 [0], given: 52

Re: xy ≠ 0 [#permalink] New post 10 Oct 2017, 10:19
Carcass wrote:



xy ≠ 0

\frac{a}{xs}=632 and \frac{a}{ys}=158
Quantity A
Quantity B
x
y



Here \frac{a}{xs} =632

or a = 632xs

And from 2nd equ we have

a= 158ys

Therefore we can write as -
632xs=158ys

or y/x = 4

There fore one possible way can be possible

if x=1 and y= 4 , therefore x<y

or if x = -1 and y = -4, therefore x>y

These both values are possible, since the question didnot mentioned that both x and y are positive

Hence option D
_________________

If you found this post useful, please let me know by pressing the Kudos Button

Re: xy ≠ 0   [#permalink] 10 Oct 2017, 10:19
Display posts from previous: Sort by

xy ≠ 0

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

GRE Prep Club Forum Home| About| Terms of Use| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.