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

It is currently 23 Oct 2018, 22:02

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

All employees of Company A and Company B work together on some project

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

Hide Tags

e-GMAT Representative
User avatar
P
Joined: 04 Jan 2015
Posts: 2069
All employees of Company A and Company B work together on some project  [#permalink]

Show Tags

New post 27 Sep 2018, 03:43
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

63% (01:15) correct 37% (01:48) wrong based on 59 sessions

HideShow timer Statistics

All employees of Company A and Company B work together on some project. The ratio of number of employees in company A and company B is 5: 6, and each employee of company A can do the work 3 times faster than each employee of company B. What fraction of the project is done by the employees of company B?

    A. 5/18
    B. 2/7
    C. 2/5
    D. 5/7
    E. 18/23

To read all our articles:Must read articles to reach Q51

Image

_________________








Register for free sessions
Number Properties | Algebra |Quant Workshop

Success Stories
Guillermo's Success Story | Carrie's Success Story

Ace GMAT quant
Articles and Question to reach Q51 | Question of the week

Must Read Articles
Number Properties – Even Odd | LCM GCD | Statistics-1 | Statistics-2
Word Problems – Percentage 1 | Percentage 2 | Time and Work 1 | Time and Work 2 | Time, Speed and Distance 1 | Time, Speed and Distance 2
Advanced Topics- Permutation and Combination 1 | Permutation and Combination 2 | Permutation and Combination 3 | Probability
Geometry- Triangles 1 | Triangles 2 | Triangles 3 | Common Mistakes in Geometry
Algebra- Wavy line | Inequalities

Practice Questions
Number Properties 1 | Number Properties 2 | Algebra 1 | Geometry | Prime Numbers | Absolute value equations | Sets



| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

Manager
Manager
avatar
S
Joined: 14 Jun 2018
Posts: 128
Re: All employees of Company A and Company B work together on some project  [#permalink]

Show Tags

New post 27 Sep 2018, 08:09
Ratio of A:B = 5:6 ; A works 3x faster than B
5x3 : 6 = 15 : 6
Part of the work B that completes = 6/21 = 2/7
Director
Director
User avatar
G
Joined: 20 Feb 2015
Posts: 793
Concentration: Strategy, General Management
Premium Member
Re: All employees of Company A and Company B work together on some project  [#permalink]

Show Tags

New post 27 Sep 2018, 08:25
EgmatQuantExpert wrote:
All employees of Company A and Company B work together on some project. The ratio of number of employees in company A and company B is 5: 6, and each employee of company A can do the work 3 times faster than each employee of company B. What fraction of the project is done by the employees of company B?

    A. 5/18
    B. 2/7
    C. 2/5
    D. 5/7
    E. 18/23

To read all our articles:Must read articles to reach Q51

Image


A/B = 5/6
we are given
when A does 1 unit of work
B does 1/3 units of work
so,
5 employees of A will do 5 units of work.
6 employees of B will do 6*\(\frac{1}{3}\) = 2 units of work

fraction of project done by employees of B = \(\frac{B}{A+B}\) =\(\frac{2}{7}\)
e-GMAT Representative
User avatar
P
Joined: 04 Jan 2015
Posts: 2069
All employees of Company A and Company B work together on some project  [#permalink]

Show Tags

New post 03 Oct 2018, 05:12
1

Solution


Given:
    • All the employees of Company A and B work on the same project
    • The ratio of number of employees in company A to company B = 5: 6
    • Each employee of company A can do the work 3 times faster, when compared to each employee of company B

To find:
    • What fraction of the project is done by employees of company B

Approach and Working:
    • Let us assume that the number of employees in company A = 5x
      o Implies, the number of employees in company B = 6x

    • Now, let us assume that each employee of company A can do 'y' amount of work in one day
      o Implies, each employee of company B can do '3y' amount of work in one day

    • So, \(\frac{Work done by all the employees of company A}{Work done by all the employees of company B}\) = \(\frac{(5x * 3y)}{(6x * y)} = \frac{15}{6} = \frac{5}{2}\)

Therefore, the fraction of work done by employees of company B = \(\frac{2}{(2 + 5)} = \frac{2}{7}\)

Hence, the correct answer is Option B.

Answer: B

Image

_________________








Register for free sessions
Number Properties | Algebra |Quant Workshop

Success Stories
Guillermo's Success Story | Carrie's Success Story

Ace GMAT quant
Articles and Question to reach Q51 | Question of the week

Must Read Articles
Number Properties – Even Odd | LCM GCD | Statistics-1 | Statistics-2
Word Problems – Percentage 1 | Percentage 2 | Time and Work 1 | Time and Work 2 | Time, Speed and Distance 1 | Time, Speed and Distance 2
Advanced Topics- Permutation and Combination 1 | Permutation and Combination 2 | Permutation and Combination 3 | Probability
Geometry- Triangles 1 | Triangles 2 | Triangles 3 | Common Mistakes in Geometry
Algebra- Wavy line | Inequalities

Practice Questions
Number Properties 1 | Number Properties 2 | Algebra 1 | Geometry | Prime Numbers | Absolute value equations | Sets



| '4 out of Top 5' Instructors on gmatclub | 70 point improvement guarantee | www.e-gmat.com

GMAT Club Bot
All employees of Company A and Company B work together on some project &nbs [#permalink] 03 Oct 2018, 05:12
Display posts from previous: Sort by

All employees of Company A and Company B work together on some project

  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®.