It is currently 23 Sep 2017, 16:50

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 weight of 10 men is increased by 1 ½ kg when one of the me

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

Hide Tags

1 KUDOS received
Manager
Manager
avatar
Joined: 04 Feb 2011
Posts: 62

Kudos [?]: 152 [1], given: 42

Location: US
The average weight of 10 men is increased by 1 ½ kg when one of the me [#permalink]

Show Tags

New post 08 Feb 2011, 11:30
1
This post received
KUDOS
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

85% (00:51) correct 15% (03:38) wrong based on 40 sessions

HideShow timer Statistics

The average weight of 10 men is increased by 1 ½ kg when one of the men who weighs 68 kg is replaced by a new man. What is the weight of the new man?

(A) 80 kg

(B) 83 kg

(C) 70 kg

(D) 75 kg

(E) 85 kg
[Reveal] Spoiler: OA

Kudos [?]: 152 [1], given: 42

Director
Director
User avatar
Status: -=Given to Fly=-
Joined: 04 Jan 2011
Posts: 830

Kudos [?]: 240 [0], given: 78

Location: India
Concentration: Leadership, Strategy
Schools: Haas '18, Kelley '18
GMAT 1: 650 Q44 V37
GMAT 2: 710 Q48 V40
GMAT 3: 750 Q51 V40
GPA: 3.5
WE: Education (Education)
Re: The average weight of 10 men is increased by 1 ½ kg when one of the me [#permalink]

Show Tags

New post 08 Feb 2011, 11:45
Since the average has increased by 1.5 kg, the weight of the man who stepped in must be equal to 68+10x1.5

68+15=83 Kg

Ans: 'B'
_________________

"Wherever you go, go with all your heart" - Confucius

Useful Threads

1. How to Review and Analyze your Mistakes (Post by BB at GMAT Club)

2. 4 Steps to Get the Most out out of your CATs (Manhattan GMAT Blog)

My Experience With GMAT

1. From 650 to 710 to 750 - My Tryst With GMAT

2. Quest to do my Best - My GMAT Journey Log

Kudos [?]: 240 [0], given: 78

Expert Post
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 41698

Kudos [?]: 124659 [0], given: 12079

Re: The average weight of 10 men is increased by 1 ½ kg when one of the me [#permalink]

Show Tags

New post 08 Feb 2011, 11:46
Lolaergasheva wrote:
The average weight of 10 men is increased by 1 ½ kg when one of the men who weighs 68 kg is replaced by a new man. What is the weight of the new man?

(A) 80 kg

(B) 83 kg

(C) 70 kg

(D) 75 kg

(E) 85 kg


The average weight of 10 men is increased by 1.5 kg means that total weight of 10 men increased by 1.5*10=15 kg. So the weight of the new man equals to the weight of the man who was replaced plus 15 kg = 68 + 15 = 83 kg.

Answer: B.
_________________

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 [?]: 124659 [0], given: 12079

Director
Director
User avatar
Status: No dream is too large, no dreamer is too small
Joined: 14 Jul 2010
Posts: 624

Kudos [?]: 1119 [0], given: 39

Re: The average weight of 10 men is increased by 1 ½ kg when one of the me [#permalink]

Show Tags

New post 08 Feb 2011, 11:59
Total weight increase for the 10 men is 1.5*10=15. So the new man brings 68+15=83kg
_________________

Collections:-
PSof OG solved by GC members: http://gmatclub.com/forum/collection-ps-with-solution-from-gmatclub-110005.html
DS of OG solved by GC members: http://gmatclub.com/forum/collection-ds-with-solution-from-gmatclub-110004.html
100 GMAT PREP Quantitative collection http://gmatclub.com/forum/gmat-prep-problem-collections-114358.html
Collections of work/rate problems with solutions http://gmatclub.com/forum/collections-of-work-rate-problem-with-solutions-118919.html
Mixture problems in a file with best solutions: http://gmatclub.com/forum/mixture-problems-with-best-and-easy-solutions-all-together-124644.html

Kudos [?]: 1119 [0], given: 39

SVP
SVP
avatar
Joined: 16 Nov 2010
Posts: 1605

Kudos [?]: 581 [0], given: 36

Location: United States (IN)
Concentration: Strategy, Technology
Premium Member Reviews Badge
Re: The average weight of 10 men is increased by 1 ½ kg when one of the me [#permalink]

Show Tags

New post 09 Feb 2011, 07:31
10*x - Initial Total (and x is initial average)

=> (10x - 68 + y)/10 = x + 3/2

=> 10x - 68 + y = 10x + 15

=> y = 83
_________________

Formula of Life -> Achievement/Potential = k * Happiness (where k is a constant)

GMAT Club Premium Membership - big benefits and savings

Kudos [?]: 581 [0], given: 36

GMAT Club Legend
GMAT Club Legend
User avatar
Joined: 09 Sep 2013
Posts: 17624

Kudos [?]: 271 [0], given: 0

Premium Member
Re: The average weight of 10 men is increased by 1 ½ kg when one of the me [#permalink]

Show Tags

New post 05 Sep 2017, 02:48
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

Kudos [?]: 271 [0], given: 0

Expert Post
Target Test Prep Representative
User avatar
S
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 1537

Kudos [?]: 778 [0], given: 2

Location: United States (CA)
Re: The average weight of 10 men is increased by 1 ½ kg when one of the me [#permalink]

Show Tags

New post 07 Sep 2017, 16:40
Lolaergasheva wrote:
The average weight of 10 men is increased by 1 ½ kg when one of the men who weighs 68 kg is replaced by a new man. What is the weight of the new man?

(A) 80 kg

(B) 83 kg

(C) 70 kg

(D) 75 kg

(E) 85 kg


We can let the initial average = x/10 in which x = the sum of the 10 men. Thus, the new average is:

(x/10) + 3/2 = (x/10) + 15/10 = (x + 15)/10

We can let n = the weight of the new man:

(x + 15)/10 = (x - 68 + n)/10

x + 15 = x - 68 + n

83 = n

Answer: B
_________________

Scott Woodbury-Stewart
Founder and CEO

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

Kudos [?]: 778 [0], given: 2

Re: The average weight of 10 men is increased by 1 ½ kg when one of the me   [#permalink] 07 Sep 2017, 16:40
Display posts from previous: Sort by

The average weight of 10 men is increased by 1 ½ kg when one of the me

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


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®.