Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 22 May 2015, 10:13

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# If d >0 and (1-c/d) is greater than or equal to zero but

Author Message
TAGS:
Manager
Joined: 09 Feb 2003
Posts: 82
Followers: 1

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

If d >0 and (1-c/d) is greater than or equal to zero but [#permalink]  28 Nov 2003, 10:17
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions
If d >0 and (1-c/d) is greater than or equal to zero but less than 1, which of the following must be true
I) c>0
II) c/d<1
III) c^2 +d^2>1( just to be clear, ^ is the exponent)
A) I only
B) II only
C) I and II
D) II and III
E) I , II and III
I chose A, but the official answer is different
Intern
Joined: 24 Nov 2003
Posts: 30
Location: Champaign
Followers: 0

Kudos [?]: 2 [0], given: 0

I agree with A

c/d<1 - it can be 1 if c=d, if c/d =1 then 0 <= will fail, so II cannot be.

c^2 + d^2 > 1 is false, because
say c=.25 & d=0.5, c/d= .5 and is true for the inequality.
Director
Joined: 14 Oct 2003
Posts: 588
Location: On Vacation at My Crawford, Texas Ranch
Followers: 1

Kudos [?]: 10 [0], given: 0

"I agree with A c/d<1 - it can be 1 if c=d, if c/d =1 then 0 <= will fail, so II cannot be.

c^2 + d^2 > 1 is false, because
say c=.25 & d=0.5, c/d= .5 and is true for the inequality."

Last edited by Titleist on 28 Nov 2003, 21:42, edited 1 time in total.
Intern
Joined: 24 Nov 2003
Posts: 30
Location: Champaign
Followers: 0

Kudos [?]: 2 [0], given: 0

(1-c/d) is greater than or equal to zero

The only way 1 - c/d can be equal to 0 is if c=d, hence II is not a possibility.
GMAT Instructor
Joined: 07 Jul 2003
Posts: 770
Location: New York NY 10024
Schools: Haas, MFE; Anderson, MBA; USC, MSEE
Followers: 13

Kudos [?]: 56 [0], given: 0

Titleist wrote:
"I agree with A c/d<1 - it can be 1 if c=d, if c/d =1 then 0 <= will fail, so II cannot be.

c^2 + d^2 > 1 is false, because
say c=.25 & d=0.5, c/d= .5 and is true for the inequality."

Read the statement carefully. I don't think that you can assume that C can equal D given the stated rule that 0<(1-c/d)<0. This implies that C must be another value besides D. In addition, c must also be < d. Also implicit in the statement given above, D is a positive number therefore C must be a positive number less than D - which makes c/d a fraction - a fraction is less than 1. Therefore, II must be true.

I don't think III MUST BE TRUE. C and D do not have to be integers - just greater than 0. If C = 1/3 and D= 1/2 then c/d = 2/3. And C^2 = 1/9 and D^2 = 1/4 combine the two fractions and of course the sum is less than 1.

read carefully. The stimulus states that 1 - c/d is greater then OR EQUAL to zero.
_________________

Best,

AkamaiBrah
Former Senior Instructor, Manhattan GMAT and VeritasPrep
Vice President, Midtown NYC Investment Bank, Structured Finance IT
MFE, Haas School of Business, UC Berkeley, Class of 2005
MBA, Anderson School of Management, UCLA, Class of 1993

Director
Joined: 14 Oct 2003
Posts: 588
Location: On Vacation at My Crawford, Texas Ranch
Followers: 1

Kudos [?]: 10 [0], given: 0

Yes, I had some cider before i turned on the computer - I will never do so again!
Similar topics Replies Last post
Similar
Topics:
4 If x is not equal to zero is xy > 0 ? 6 24 Sep 2012, 22:06
PS_Greater than Zero 2 14 Jun 2009, 08:10
If y is greater than equal to zero, what is the value of x: 3 28 Mar 2009, 08:30
If ab > cd and a, b, c and d are all greater than zero, 1 25 Jun 2007, 18:22
Symbol denotes the least integer greater than or equal to d, 3 12 Jun 2007, 01:44
Display posts from previous: Sort by