GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 21 Mar 2019, 01:20

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

The average salary of all the workers in a workshop is Rs.8000. The av

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

Hide Tags

 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 53748
The average salary of all the workers in a workshop is Rs.8000. The av  [#permalink]

Show Tags

New post 21 Feb 2019, 00:33
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

73% (01:56) correct 27% (02:18) wrong based on 11 sessions

HideShow timer Statistics

The average salary of all the workers in a workshop is Rs.8000. The average salary of 7 technicians is Rs.12000 and the average salary of the rest is Rs.6000. The total number of workers in the workshop is:

A. 21
B. 25
C. 36
D. 49
E. 50

_________________

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

Manager
Manager
User avatar
S
Joined: 20 Mar 2018
Posts: 57
Location: Ghana
Concentration: Finance, Real Estate
Re: The average salary of all the workers in a workshop is Rs.8000. The av  [#permalink]

Show Tags

New post 21 Feb 2019, 01:34
Save time by using the weighted average formula (slightly derived ratio form of weighted average)

Let x= the number of the rest of workers in the workshop
w1/w2 = (A2 - A)/(A - A1)
w1=x ,w2= 7 technicians ,A2= avg. salary 12000,A1= avg. salary 6000,A= overall avg.=8000
x/7=(12000-8000)/(8000-6000)
x/7=(4000)/(2000) —> x/7=2
x=14
Total number of people in workshops =14+7 =21
Answer is A
Hope it helps

Posted from my mobile device
SVP
SVP
User avatar
P
Joined: 18 Aug 2017
Posts: 2410
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
GMAT ToolKit User Premium Member CAT Tests
Re: The average salary of all the workers in a workshop is Rs.8000. The av  [#permalink]

Show Tags

New post 21 Feb 2019, 09:50
Bunuel wrote:
The average salary of all the workers in a workshop is Rs.8000. The average salary of 7 technicians is Rs.12000 and the average salary of the rest is Rs.6000. The total number of workers in the workshop is:

A. 21
B. 25
C. 36
D. 49
E. 50



weighted avg

w1/w2= a2-a/a-a1
x/7=12000-8000/8000-6000
x= 14
14+7 ; 21
IMO A
_________________

If you liked my solution then please give Kudos. Kudos encourage active discussions.

GMAT Club Bot
Re: The average salary of all the workers in a workshop is Rs.8000. The av   [#permalink] 21 Feb 2019, 09:50
Display posts from previous: Sort by

The average salary of all the workers in a workshop is Rs.8000. The av

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


Copyright

GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| 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®.