Production index p is directly proportional to efficiency : Quant Question Archive [LOCKED]
Check GMAT Club App Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

It is currently 11 Dec 2016, 05:55
GMAT Club Tests

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Production index p is directly proportional to efficiency

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Senior Manager
Senior Manager
User avatar
Joined: 19 Mar 2008
Posts: 354
Followers: 1

Kudos [?]: 52 [0], given: 0

Production index p is directly proportional to efficiency [#permalink]

Show Tags

New post 25 Jun 2008, 06:22
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Production index p is directly proportional to efficiency index e, which is in turn directly proportional to investment index i. What is p if i = 70?
(1) e = 0.5 whenever i = 60
(2) p = 2.0 whenever i = 50

OA is <B>

I am confused. Since p is directly propositional to both i and e at the same time. The answer explanation seems ignore e can be changing too.

pls share some view.

Tksss
Current Student
User avatar
Joined: 12 Jun 2008
Posts: 287
Schools: INSEAD Class of July '10
Followers: 7

Kudos [?]: 50 [0], given: 0

Re: GMAT OA, help pls [#permalink]

Show Tags

New post 25 Jun 2008, 06:29
"Production index p is directly proportional to efficiency index e": we can write p = K * e (with K a constant)

"which is in turn directly proportional to investment index i": we can write e = J * i (with J a constant)

Thus we also know that p = K * J * i

(1) gives us 0.5 = J * 60 => J=1/120

But we don't know anything about K --> insufficient

(2) gives us 2 = K * J * 50 => K * J = 1 / 25

Therefore when i=70, we can write: p = K * J * i = 1 / 25 * 70 = 14 / 5 --> sufficient
Intern
Intern
avatar
Joined: 20 Jun 2008
Posts: 22
Followers: 0

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

Re: GMAT OA, help pls [#permalink]

Show Tags

New post 25 Jun 2008, 06:30
As you see the relation between e and p is not given in the question.
(2) p = 2.0 whenever i = 50
Hence here p already includes the effect of e in itself.
whenever i changes e changes and in turn p changes and it becomes 2.0.
am i clear?


judokan wrote:
Production index p is directly proportional to efficiency index e, which is in turn directly proportional to investment index i. What is p if i = 70?
(1) e = 0.5 whenever i = 60
(2) p = 2.0 whenever i = 50

OA is <B>

I am confused. Since p is directly propositional to both i and e at the same time. The answer explanation seems ignore e can be changing too.

pls share some view.

Tksss
Director
Director
avatar
Joined: 01 Jan 2008
Posts: 629
Followers: 4

Kudos [?]: 170 [0], given: 1

Re: GMAT OA, help pls [#permalink]

Show Tags

New post 25 Jun 2008, 09:55
judokan wrote:
Production index p is directly proportional to efficiency index e, which is in turn directly proportional to investment index i.


There are three statments here: p = c1*e, e = c2*i and p = (c1*c2)*i.

judokan wrote:
What is p if i = 70?


You can use one of two statements: p = c1*e and p = (c1*c2)*i -> B
Senior Manager
Senior Manager
User avatar
Joined: 19 Mar 2008
Posts: 354
Followers: 1

Kudos [?]: 52 [0], given: 0

Re: GMAT OA, help pls [#permalink]

Show Tags

New post 25 Jun 2008, 17:39
I understand now.

Actually, I misread the question. I thought it was

P = constant x efficiency x investment

Tks all!
Re: GMAT OA, help pls   [#permalink] 25 Jun 2008, 17:39
Display posts from previous: Sort by

Production index p is directly proportional to efficiency

  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 and phpBB SEO

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®.