It is currently 23 Mar 2018, 15:05

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# PS-algebra

Author Message
Senior Manager
Joined: 19 Nov 2007
Posts: 438

### Show Tags

03 Jan 2009, 18:25
00:00

Difficulty:

(N/A)

Question Stats:

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

### HideShow timer Statistics

If w>y, the average of x and y is z, and the average of z and x is w, what is the value of x-w / w-y?

A] 1/4
B] 1/3
C] 1/2
D] 3
E] 4

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________

-Underline your question. It takes only a few seconds!
-Search before you post.

SVP
Joined: 29 Aug 2007
Posts: 2452

### Show Tags

03 Jan 2009, 22:05
vscid wrote:
If w>y, the average of x and y is z, and the average of z and x is w, what is the value of x-w / w-y?

A] 1/4
B] 1/3
C] 1/2
D] 3
E] 4

x+y = 2z -------------1
z+x = 2w
z = 2w - x -----------2
put z's value on 1.
x+y = 2 (2w - x)
y = 4w - 2x - x
y = 4w - 3x

= (x-w)/(w-y)
= (x-w)/(w-4w + 3x)
= (x-w)/(3x - 3w)
= (x-w)/{3(x-w)}
= 1/3
B.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

_________________

Gmat: http://gmatclub.com/forum/everything-you-need-to-prepare-for-the-gmat-revised-77983.html

GT

Re: PS-algebra   [#permalink] 03 Jan 2009, 22:05
Display posts from previous: Sort by