Find all School-related info fast with the new School-Specific MBA Forum

It is currently 01 Sep 2015, 22:31
GMAT Club 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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

A report consisting of 2,600 words is divided into 23 paragr

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
1 KUDOS received
Manager
Manager
avatar
Joined: 02 Dec 2012
Posts: 178
Followers: 3

Kudos [?]: 992 [1] , given: 0

A report consisting of 2,600 words is divided into 23 paragr [#permalink] New post 18 Dec 2012, 07:01
1
This post received
KUDOS
7
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

71% (02:30) correct 29% (01:47) wrong based on 450 sessions
A report consisting of 2,600 words is divided into 23 paragraphs. A 2-paragraph preface is then added to the report. Is the average (arithmetic mean) number of words per paragraph for all 25 paragraphs less than 120 ?

(1) Each paragraph of the preface has more than 100 words.
(2) Each paragraph of the preface has fewer than 150 words.
[Reveal] Spoiler: OA
Expert Post
6 KUDOS received
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 29185
Followers: 4736

Kudos [?]: 50053 [6] , given: 7525

Re: A report consisting of 2,600 words is divided into 23 paragr [#permalink] New post 18 Dec 2012, 07:06
6
This post received
KUDOS
Expert's post
1
This post was
BOOKMARKED
A report consisting of 2,600 words is divided into 23 paragraphs. A 2-paragraph preface is then added to the report. Is the average (arithmetic mean) number of words per paragraph for all 25 paragraphs less than 120 ?

The question asks whether the average number of words per paragraph for all 25 paragraphs is less than 120, or whether the total number of words for all 25 paragraphs is less than 25*120=3,000. Thus, the question basically asks whether the total number of words for 2-paragraph preface is less than 3,000-2,600=400.

(1) Each paragraph of the preface has more than 100 words. This implies that the total number of words for 2-paragraph preface is more than 200. Not sufficient.

(2) Each paragraph of the preface has fewer than 150 words. This implies that the total number of words for 2-paragraph preface is less than 300. Sufficient.

Answer: B.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis ; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) ; 12. 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?
25 extra-hard Quant Tests

GMAT Club Premium Membership - big benefits and savings

GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 6168
Followers: 344

Kudos [?]: 70 [0], given: 0

Premium Member
Re: A report consisting of 2,600 words is divided into 23 paragr [#permalink] New post 31 Aug 2014, 07:01
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

Current Student
avatar
Joined: 11 Jun 2014
Posts: 57
Concentration: Technology, Marketing
GMAT 1: 770 Q50 V45
WE: Information Technology (Consulting)
Followers: 2

Kudos [?]: 23 [0], given: 3

Re: A report consisting of 2,600 words is divided into 23 paragr [#permalink] New post 31 Aug 2014, 08:27
the report already has 2600 words and 23 paragraphs .. if 2 paragraphs are added that would take the total no. of paragraphs to 25.
for the average no .of of words per paragraph to be less than 120, the total no. of words need to be less than 3000.

statement I says , the paragraphs have more than 100 words .. but do not extly how much .. could be 500 each in which case the toal number of words in the report may go well beyond 3000.

statement II says, the new paragraphs have less than 150 words.. so the two new paragraphs together have less than 300 words.. so the total no .of words in the paragraph will be less than 3000.

so II alone is sufficient to answer the question.
Intern
Intern
avatar
Joined: 29 Oct 2013
Posts: 20
Followers: 0

Kudos [?]: 10 [0], given: 8

Re: A report consisting of 2,600 words is divided into 23 paragr [#permalink] New post 31 Aug 2014, 23:34
If the average is 120 words per paragraph, then for 25 paragraphs, there will be a total of 25*120=3000 words. So any total less than 3000 words will give an average less than 120.

(1) Each paragraph of the preface has more than 100 words.
The total number of words may or may not exceed 3000. Insufficient

(2) Each paragraph of the preface has fewer than 150 words.
The total number of words cannot exceed 2750 so average is less than 120. SUFFICIENT

Answer B
Intern
Intern
avatar
Joined: 29 Oct 2014
Posts: 22
Followers: 0

Kudos [?]: 7 [0], given: 11

A report consisting of 2,600 words is divided into 23 paragr [#permalink] New post 02 Apr 2015, 22:00
1
This post was
BOOKMARKED
Question. I tried 2 ways. First way worked, second way didn't. Could someone have a look and let me know where I went wrong with the 2nd method?

FIRST WAY (CORRECT):

Background info:
Y/N question
23 paragraphs, 2,600 words
Added 2 preface paragraphs. Let x be total of new words added.
Thus question is: (2,600+x)/25<120? OR, simply, is x<400?

Stem (1): Each preface paragraph has 100+ words.
If each preface paragraph has 101 words then x= 2*(101) = 202 words. This would make x<400
Alternatively if each preface paragraph has 250 words then x=2*(202) = 404 words. This would mean x>400. Stem 1 is Insufficient.

Stem (2) Each preface paragraph has less than 150 words. This means x is AT MOST 2*(149) = 298 words. I.e. x MUST BE <400. Stem 1 is Sufficient.

FINAL ANSWER: B

WAY TWO (INCORRECT)

I worked out the average word count for the current 23 paragraphs: 2,600/23= approx 113 words
I then thought, if the new average (inclusive of 2 preface paragraphs) is 120 then the difference b/w the 2 averages is 7 words.
The total number of words added due to preface paragraphs would then = 7*25 = 175 words
The answer stem has to tell me if the 2 new paragraphs has less or more than 175 words.

Stem (1): Each preface paragraph has 100+ words. Total must be more than 175 words. Sufficient
Stem (2): Each preface paragraph has less than 150 words. So could be 100 words, 200 words, 298 words. NOT sufficient

FINAL ANSWER: A

Thanks guys!
Expert Post
1 KUDOS received
EMPOWERgmat Instructor
User avatar
Status: GMAT Assassin/Co-Founder
Affiliations: EMPOWERgmat
Joined: 19 Dec 2014
Posts: 3487
Location: United States (CA)
GMAT 1: 800 Q51 V49
GRE 1: 340 Q170 V170
Followers: 148

Kudos [?]: 933 [1] , given: 57

Re: A report consisting of 2,600 words is divided into 23 paragr [#permalink] New post 03 Apr 2015, 15:38
1
This post received
KUDOS
Expert's post
Hi ColdSushi,

There's nothing wrong with the second approach that you took (although the "rounding" that did could be a problem in certain questions that require specifics/accuracy).

The "7 word difference" you calculated IS correct, but you also have to account for the 120 words that would need to appear in EACH of the 2 preface paragraphs. Your calculation didn't do that.

Using your approximation, your calculation should have been (7)(25) + 2(120) = 415 words

Using this value, you would have gotten the correct answer.

GMAT assassins aren't born, they're made,
Rich
_________________

Official Guide 2016 Question Breakdown:
http://gmatclub.com/forum/empowergmat-blog-198415.html#p1527977

Rich Cohen
Rich.C@empowergmat.com
http://www.empowergmat.com

GMAT Club Verified Reviews for EMPOWERgmat & Special Discount

EMPOWERgmat Podcast - A Wild Secret About The GMAT Algorithm


Intern
Intern
avatar
Joined: 29 Oct 2014
Posts: 22
Followers: 0

Kudos [?]: 7 [0], given: 11

Re: A report consisting of 2,600 words is divided into 23 paragr [#permalink] New post 09 Apr 2015, 17:56
EMPOWERgmatRichC wrote:
Hi ColdSushi,

There's nothing wrong with the second approach that you took (although the "rounding" that did could be a problem in certain questions that require specifics/accuracy).

The "7 word difference" you calculated IS correct, but you also have to account for the 120 words that would need to appear in EACH of the 2 preface paragraphs. Your calculation didn't do that.

Using your approximation, your calculation should have been (7)(25) + 2(120) = 415 words

Using this value, you would have gotten the correct answer.

GMAT assassins aren't born, they're made,
Rich


Thanks very much Rich. Appreciate your help and it makes sense now! :)
Re: A report consisting of 2,600 words is divided into 23 paragr   [#permalink] 09 Apr 2015, 17:56
    Similar topics Author Replies Last post
Similar
Topics:
2 Experts publish their posts in the topic An artist's portfolio consisting of 1,000 photos is divided into 20 su Bunuel 3 13 Feb 2015, 07:46
17 Experts publish their posts in the topic A set of nonnegative integers consists of madimo 9 09 Oct 2012, 07:33
word problem raghavs 0 07 Mar 2010, 10:00
7 Experts publish their posts in the topic Set S consists of 5 consecutive integers, and set T consists nischalb 5 04 Nov 2006, 03:25
2 Experts publish their posts in the topic A report consisting of 2,600 words is divided into 23 haas_mba07 11 06 Sep 2006, 19:45
Display posts from previous: Sort by

A report consisting of 2,600 words is divided into 23 paragr

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| 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®.