Last visit was: 21 Jul 2024, 20:55 It is currently 21 Jul 2024, 20:55
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
SORT BY:
Date
Tags:
Show Tags
Hide Tags
User avatar
Intern
Intern
Joined: 22 Mar 2010
Posts: 35
Own Kudos [?]: 206 [53]
Given Kudos: 1
Send PM
Most Helpful Reply
Math Expert
Joined: 02 Sep 2009
Posts: 94441
Own Kudos [?]: 642836 [20]
Given Kudos: 86716
Send PM
Director
Director
Joined: 26 Oct 2016
Posts: 506
Own Kudos [?]: 3411 [6]
Given Kudos: 877
Location: United States
Concentration: Marketing, International Business
Schools: HBS '19
GMAT 1: 770 Q51 V44
GPA: 4
WE:Education (Education)
Send PM
General Discussion
Manager
Manager
Joined: 02 Nov 2009
Posts: 74
Own Kudos [?]: 674 [1]
Given Kudos: 180
Send PM
Re: Over a certain time period, did the number of shares of stock in Ruth' [#permalink]
i vvonder vvhat is really the concept being tested here ..
User avatar
Director
Director
Joined: 22 Mar 2011
Posts: 518
Own Kudos [?]: 2160 [1]
Given Kudos: 43
WE:Science (Education)
Send PM
Re: Over a certain time period, did the number of shares of stock in Ruth' [#permalink]
1
Kudos
venmic wrote:
i vvonder vvhat is really the concept being tested here ..


I think maybe "How to compare two fractions"?

(1) For example, \(S/(S+B)\) can increase if S increases and B stays the same, but also if S stays the same and B decreases (she can sell some bonds).
Therefore, (1) is not sufficient.

(2) Obviously, not sufficient. S+B can also increase by increasing B, while S stays the same.

(1) and (2) together: We have to compare \(\frac{S_1}{S_1+B_1}\) to \(\frac{S_2}{S_2+B_2}\). If \(S_2+B_2 > S_1+B_1\) (the total number increased), then to have the second fraction larger than the first we need a larger \(S_2\), or increase in S. Otherwise, the second fraction is going to be smaller, because it has a larger denominator.

Answer, definitely C.
User avatar
Non-Human User
Joined: 09 Sep 2013
Posts: 34040
Own Kudos [?]: 853 [0]
Given Kudos: 0
Send PM
Re: Over a certain time period, did the number of shares of stock in Ruth' [#permalink]
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
Re: Over a certain time period, did the number of shares of stock in Ruth' [#permalink]
Moderator:
Math Expert
94441 posts