It is currently 11 Dec 2017, 12:14

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

The average (arithmetic mean) of a list of positive numbers is what

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

Hide Tags

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 42544

Kudos [?]: 135256 [0], given: 12679

The average (arithmetic mean) of a list of positive numbers is what [#permalink]

Show Tags

New post 07 Nov 2017, 23:25
Expert's post
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

43% (00:28) correct 57% (00:33) wrong based on 87 sessions

HideShow timer Statistics

The average (arithmetic mean) of a list of positive numbers is what percent of the sum of the numbers?

(1) The sum of the numbers in the list is 150.
(2) There are 25 numbers in the list.
[Reveal] Spoiler: OA

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | 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

Kudos [?]: 135256 [0], given: 12679

3 KUDOS received
Intern
Intern
avatar
B
Joined: 28 Dec 2010
Posts: 49

Kudos [?]: 10 [3], given: 7

CAT Tests
The average (arithmetic mean) of a list of positive numbers is what [#permalink]

Show Tags

New post 08 Nov 2017, 00:11
3
This post received
KUDOS
\(Mean = \frac{sum of numbers}{count of numbers}\)

So % asked = (mean/sum of numbers ) * 100
= 100/ count of numbers

1. Not helpful. We don't know the count.
2. We just need count.

B.
_________________

_________________________________________
Please Kudos, if you found this post helpful.

Kudos [?]: 10 [3], given: 7

1 KUDOS received
DS Forum Moderator
avatar
S
Joined: 22 Aug 2013
Posts: 557

Kudos [?]: 180 [1], given: 284

Location: India
Re: The average (arithmetic mean) of a list of positive numbers is what [#permalink]

Show Tags

New post 26 Nov 2017, 00:22
1
This post received
KUDOS
For given n numbers, their average = (their sum)/n OR average/Sum = 1/n
So if we are asked that average is what % of sum, we have to find
Average/Sum * 100 = 1/n * 100

So if we can get n, we can get the answer. Statement 2 gives us the value of n, but statement 1 does not.

Hence B answer

Kudos [?]: 180 [1], given: 284

Expert Post
1 KUDOS received
SVP
SVP
User avatar
G
Joined: 08 Jul 2010
Posts: 1857

Kudos [?]: 2395 [1], given: 51

Location: India
GMAT: INSIGHT
WE: Education (Education)
Reviews Badge
Re: The average (arithmetic mean) of a list of positive numbers is what [#permalink]

Show Tags

New post 26 Nov 2017, 02:14
1
This post received
KUDOS
Expert's post
Bunuel wrote:
The average (arithmetic mean) of a list of positive numbers is what percent of the sum of the numbers?

(1) The sum of the numbers in the list is 150.
(2) There are 25 numbers in the list.



Average as a percentage of the sum of the numbers = Average of Number *100 / Sum of the numbers

Average as a percentage of the sum of the numbers = (Sum of Number/Count of Numbers) *100 / Sum of the numbers


Average as a percentage of the sum of the numbers = 100/Count of Numbers)

Statement 1: NOT SUFFICIENT

Statement 2: SUFFICIENT

Answer: option B
_________________

Prosper!!!
GMATinsight
Bhoopendra Singh and Dr.Sushma Jha
e-mail: info@GMATinsight.com I Call us : +91-9999687183 / 9891333772
Online One-on-One Skype based classes and Classroom Coaching in South and West Delhi
http://www.GMATinsight.com/testimonials.html

22 ONLINE FREE (FULL LENGTH) GMAT CAT (PRACTICE TESTS) LINK COLLECTION

Kudos [?]: 2395 [1], given: 51

Re: The average (arithmetic mean) of a list of positive numbers is what   [#permalink] 26 Nov 2017, 02:14
Display posts from previous: Sort by

The average (arithmetic mean) of a list of positive numbers is what

  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 | Emoji artwork provided by EmojiOne

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®.