It is currently 28 Jun 2017, 10:56

Live Now:

Open Admission Chat with MBA Expert, Donna Bauman. (Kellogg MBA Graduate and Former UNC Adcom)


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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If x + y= 8z, then which of the following represents the ave

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
Math Expert
User avatar
D
Joined: 02 Sep 2009
Posts: 39750
If x + y= 8z, then which of the following represents the ave [#permalink]

Show Tags

New post 19 Feb 2014, 01:21
Expert's post
7
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

88% (01:46) correct 12% (01:43) wrong based on 484 sessions

HideShow timer Statistics

The Official Guide For GMAT® Quantitative Review, 2ND Edition

If x + y= 8z, then which of the following represents the average (arithmetic mean) of x, y, and z, in terms of z ?

(A) 2z + 1
(B) 3z
(C) 5z
(D) z/3
(E) 3z/2

Problem Solving
Question: 104
Category: Arithmetic Percents
Page: 75
Difficulty: 550


GMAT Club is introducing a new project: The Official Guide For GMAT® Quantitative Review, 2ND Edition - Quantitative Questions Project

Each week we'll be posting several questions from The Official Guide For GMAT® Quantitative Review, 2ND Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution.

We'll be glad if you participate in development of this project:
1. Please provide your solutions to the questions;
2. Please vote for the best solutions by pressing Kudos button;
3. Please vote for the questions themselves by pressing Kudos button;
4. Please share your views on difficulty level of the questions, so that we have most precise evaluation.

Thank you!
[Reveal] Spoiler: OA

_________________

New to the Math Forum?
Please read this: All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:
GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:
PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.


What are GMAT Club Tests?
Extra-hard Quant Tests with Brilliant Analytics

Expert Post
1 KUDOS received
Math Expert
User avatar
D
Joined: 02 Sep 2009
Posts: 39750
Re: If x + y= 8z, then which of the following represents the ave [#permalink]

Show Tags

New post 19 Feb 2014, 01:21
1
This post received
KUDOS
Expert's post
2
This post was
BOOKMARKED
Senior Manager
Senior Manager
avatar
Joined: 20 Dec 2013
Posts: 267
Location: India
Re: If x + y= 8z, then which of the following represents the ave [#permalink]

Show Tags

New post 19 Feb 2014, 02:48
Option B.
Average of x,y and z=>(x+y+z)/3
x+y=8z(given)
Replacing we get,9z/3=3z
Expert Post
Math Expert
User avatar
D
Joined: 02 Sep 2009
Posts: 39750
Re: If x + y= 8z, then which of the following represents the ave [#permalink]

Show Tags

New post 22 Feb 2014, 06:06
Intern
Intern
avatar
Joined: 17 Oct 2013
Posts: 41
Schools: HEC Dec"18
GMAT Date: 02-04-2014
Re: If x + y= 8z, then which of the following represents the ave [#permalink]

Show Tags

New post 24 Feb 2014, 05:06
Bunuel wrote:
The Official Guide For GMAT® Quantitative Review, 2ND Edition

If x + y= 8z, then which of the following represents the average (arithmetic mean) of x, y, and z, in terms of z ?

(A) 2z + 1
(B) 3z
(C) 5z
(D) z/3
(E) 3z/2

Problem Solving
Question: 104
Category: Arithmetic Percents
Page: 75
Difficulty: 550


GMAT Club is introducing a new project: The Official Guide For GMAT® Quantitative Review, 2ND Edition - Quantitative Questions Project

Each week we'll be posting several questions from The Official Guide For GMAT® Quantitative Review, 2ND Edition and then after couple of days we'll provide Official Answer (OA) to them along with a slution.

We'll be glad if you participate in development of this project:
1. Please provide your solutions to the questions;
2. Please vote for the best solutions by pressing Kudos button;
3. Please vote for the questions themselves by pressing Kudos button;
4. Please share your views on difficulty level of the questions, so that we have most precise evaluation.

Thank you!



Average of x,y,z is (x+y+z)/3=(8z+z)/3=3z
:)
GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 16023
Premium Member
Re: If x + y= 8z, then which of the following represents the ave [#permalink]

Show Tags

New post 25 Sep 2015, 20:50
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 16023
Premium Member
Re: If x + y= 8z, then which of the following represents the ave [#permalink]

Show Tags

New post 12 Jan 2017, 12:29
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Expert Post
Optimus Prep Instructor
User avatar
B
Joined: 06 Nov 2014
Posts: 1845
Re: If x + y= 8z, then which of the following represents the ave [#permalink]

Show Tags

New post 12 Jan 2017, 15:29
Bunuel wrote:

If x + y= 8z, then which of the following represents the average (arithmetic mean) of x, y, and z, in terms of z ?

(A) 2z + 1
(B) 3z
(C) 5z
(D) z/3
(E) 3z/2



AM of x, y, z = (x+y+z)/3 = (8z+z)/3 = 3z

Correct Option: B
_________________

Janielle Williams

Customer Support

Special Offer: $80-100/hr. Online Private Tutoring
GMAT On Demand Course $299
Free Online Trial Hour

Senior Manager
Senior Manager
User avatar
P
Joined: 02 Jan 2017
Posts: 316
Location: Canada
Reviews Badge
Re: If x + y= 8z, then which of the following represents the ave [#permalink]

Show Tags

New post 13 Jan 2017, 04:47
x+y=8z then (x+y+)z/3=(8z+z)/3=9z/3=3z.
Expert Post
1 KUDOS received
Target Test Prep Representative
User avatar
S
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 1158
Location: United States (CA)
Re: If x + y= 8z, then which of the following represents the ave [#permalink]

Show Tags

New post 16 Jan 2017, 18:03
1
This post received
KUDOS
Expert's post
Bunuel wrote:

If x + y= 8z, then which of the following represents the average (arithmetic mean) of x, y, and z, in terms of z ?

(A) 2z + 1
(B) 3z
(C) 5z
(D) z/3
(E) 3z/2


We need to determine the average of x, y, and z. In other words:

(x + y + z)/3 = ?

Since x + y = 8z, we can substitute 8z for x + y in our average formula and we have:

(8z + z)/3 = 9z/3 = 3z

Answer: B
_________________

Scott Woodbury-Stewart
Founder and CEO

GMAT Quant Self-Study Course
500+ lessons 3000+ practice problems 800+ HD solutions

Re: If x + y= 8z, then which of the following represents the ave   [#permalink] 16 Jan 2017, 18:03
    Similar topics Author Replies Last post
Similar
Topics:
3 Experts publish their posts in the topic If x > y and y > z, which of the following represents the greatest num Bunuel 12 05 May 2017, 01:02
1 Experts publish their posts in the topic Which of the following represents the profit from the investment of x Bunuel 5 26 Jul 2015, 12:13
214 Experts publish their posts in the topic Which of the following represents the complete range of x gmatpapa 51 08 Oct 2016, 07:06
4 Experts publish their posts in the topic If x+y=8z, then which of the following represents the averag Lolaergasheva 6 17 Apr 2017, 19:06
13 If -2<= x <= 2 and 3 <= y <= 8, which of the following represents the vivektripathi 9 19 May 2016, 10:16
Display posts from previous: Sort by

If x + y= 8z, then which of the following represents the ave

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


cron

GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.