It is currently 16 Dec 2018, 15:01

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

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

Three factory employees work at constant rates to produce

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
GMAT Club Legend
Joined: 07 Jun 2014
Posts: 4750
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 93

Kudos [?]: 1664 [0], given: 396

Three factory employees work at constant rates to produce [#permalink]  09 Dec 2017, 19:29
Expert's post
00:00

Question Stats:

100% (03:48) correct 0% (00:00) wrong based on 1 sessions
Three factory employees work at constant rates to produce DVDs. Employee A produces y DVDs in $$\frac{2}{5}$$ of an hour. Employee B produces y DVDs in $$\frac{3}{5}$$ of an hour. Employee C produces y DVDs in $$\frac{5}{4}$$ of an hour. Which of the following combinations of employees can produce at least 5y DVDs in 2 hours?
Indicate all such statements.

A. Employee A alone
B. Employee B alone
C. Employee C alone
D. Employees A and B together
E. Employees B and C together
F. Employees A, B, and C together
G. Even if all three employees work together, they will not finish the job

[Reveal] Spoiler: OA
A, D, F

Drill 4
Question: 8
Page: 532

_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

GMAT Club Legend
Joined: 07 Jun 2014
Posts: 4750
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 93

Kudos [?]: 1664 [0], given: 396

Re: Three factory employees work at constant rates to produce [#permalink]  29 Dec 2017, 16:43
Expert's post
Explanation

Plug in for y. If y = 30, then Employee A produces 30 DVDs in $$\frac{2}{5}$$ of an hour, so using a Rate Pie you can figure out that his rate is 75 DVDs per hour. Employee B produces 30 DVDs in of $$\frac{3}{5}$$ an hour, so his rate is 50 DVDs per hour. Employee C produces 30 DVDs $$\frac{5}{4}$$ in of an hour, so his rate is 24 DVDs per hour.

5y = 150, so you need to find the combination of employees that can produce 150 DVDs in 2 hours. Employee A will produce exactly 150 DVDs in 2 hours, so choice (A) is a credited answer. If you know that Employee A alone can produce 5y DVDs in 2 hours, then choices (D) and (F) must also be correct answers, and choice (G) must be incorrect.

Employee B will only produce 100 DVDs in 2 hours, so you can eliminate choice (B). Employee C will only produce 48 DVDs in 2 hours, so you can also eliminate choice (C). If Employees B and C work together for 2 hours, they will produce 148 DVDs, so choice (E) is incorrect.
_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Re: Three factory employees work at constant rates to produce   [#permalink] 29 Dec 2017, 16:43
Display posts from previous: Sort by

Three factory employees work at constant rates to produce

 Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.