NEW HERE? LEARN MORE
closeclose
Last visit was: 24 Apr 2024, 17:10 It is currently 24 Apr 2024, 17:10
Decision Tracker
My Rewards
New posts
New comers' posts

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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel

If two copying machines work simultaneously at their respective

SORT BY:
Date
Kudos
Tags:
Find Similar Topics 
Show Tags
Hide Tags
User avatar
udaymathapati
Manager
Manager
Joined: 06 Apr 2010
Posts: 93
Own Kudos [?]: 4922 [31]
Given Kudos: 15
Send PM
Reviews Badge
If two copying machines work simultaneously at their respective [#permalink] New post   08 Sep 2010, 11:40
5
Kudos
26
Bookmarks
00:00
A
B
C
D
E

Difficulty:

25% (medium)

Question Stats:

67% (00:49) correct 33% (00:57) wrong based on 893 sessions
Hide Show timer Statistics
If two copying machines work simultaneously at their respective constant rates, how many copies do they produce in 5 minutes?

(1) One of the machines produces copies at the constant rate of 250 copies per minute.

(2) One of the machines produces copies at twice the constant rate of the other machine.


ID 13609
ShowHide Answer
Official Answer
E
Most Helpful Reply
User avatar
L
Bunuel
Math Expert
Joined: 02 Sep 2009
Posts: 92900
Own Kudos [?]: 618813 [9]
Given Kudos: 81588
Send PM
CAT Tests Forum Quiz Mode
If two copying machines work simultaneously at their respective [#permalink] New post   28 Jan 2012, 04:13
4
Kudos
5
Bookmarks
Expert Reply
RadhaKrishnan wrote:
If two copying machines work simultaneously at their respective constant rates, how many copies do they produce in 5 minutes?

(1) One of the machines produces copies at the constant rate of 250 copies per minute.

(2) One of the machines produces copies at twice the constant rate of the other machine.


Straight E, though a little bit tricky. All we need to know is the rates of these machines. Though from both statement the rates can be:

250 copies per minute and 500 copies per minute;

250 copies per minute and 125 copies per minute.
General Discussion
User avatar
shaselai
Current Student
Joined: 12 Jun 2009
Status:What's your raashee?
Posts: 1675
Own Kudos [?]: 427 [3]
Given Kudos: 52
Location: United States (NC)
Concentration: Strategy, Finance
Schools: UNC (Kenan-Flagler) - Class of 2013
GMAT 1: 720 Q49 V39
WE:Programming (Computer Software)
Send PM
Reviews Badge
Re: If two copying machines work simultaneously at their respective [#permalink] New post   08 Sep 2010, 12:05
2
Kudos
1
Bookmarks
udaymathapati wrote:
If two copying machines work simultaneously at their respective constant rates, how many copies do they produce in 5 minutes?
(1) One of the machines produces copies at the constant rate of 250 copies per minute.
(2) One of the machines produces copies at twice the constant rate of the other machine.



1. obviously INSUFF since you know nothing about the other machine.
2. INSUFF since you dont know the rate - it could be 10/min or 20/min so end result differs

Combine:
M1 = 250/min
M2 COULD be 500/min OR 125/min since M1 could be the machine that produces 250/min AND the same machine that is twice the rate from 2. so as you can see the end result differrs.

E
User avatar
agnok
Manager
Manager
Joined: 17 Nov 2009
Posts: 204
Own Kudos [?]: 262 [1]
Given Kudos: 17
Send PM
Re: If two copying machines work simultaneously at their respective [#permalink] New post   08 Sep 2010, 13:14
1
Kudos
udaymathapati wrote:
If two copying machines work simultaneously at their respective constant rates, how many copies do they produce in 5 minutes?
(1) One of the machines produces copies at the constant rate of 250 copies per minute.
(2) One of the machines produces copies at twice the constant rate of the other machine.


To answer this question I need to know the rates of both the machines. Without that it is not possible to answer the question
St 1: Only gives me one rate
st 2: Just gives me a relation

1+ 2 = Cannot give me anything since I donot know if 250 c/min is the rate of the faster or the slower machine.

Hence E
User avatar
bumpbot
Non-Human User
Joined: 09 Sep 2013
Posts: 32655
Own Kudos [?]: 821 [0]
Given Kudos: 0
Send PM
Re: If two copying machines work simultaneously at their respective [#permalink] New post   20 Nov 2023, 09:29
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 Club Bot
gmatclubot
Re: If two copying machines work simultaneously at their respective [#permalink]
20 Nov 2023, 09:29
Moderator:
Bunuel
Math Expert
92900 posts

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne
Main navigation
GMAT Resources
Partners
MBA Resources
www.gmac.com|www.mba.com | | GMAT Club Rules | Terms and Conditions