Last visit was: 14 Jul 2024, 13:05 It is currently 14 Jul 2024, 13:05
Toolkit
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
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

# If s/t = 2, then the value of which of the following can be determined

SORT BY:
Tags:
Show Tags
Hide Tags
Senior Manager
Joined: 04 Sep 2017
Posts: 325
Own Kudos [?]: 20613 [22]
Given Kudos: 51
GMAT Club Legend
Joined: 12 Sep 2015
Posts: 6805
Own Kudos [?]: 30798 [2]
Given Kudos: 799
VP
Joined: 31 Oct 2013
Posts: 1259
Own Kudos [?]: 1191 [1]
Given Kudos: 635
Concentration: Accounting, Finance
GPA: 3.68
WE:Analyst (Accounting)
Intern
Joined: 18 Jul 2017
Posts: 11
Own Kudos [?]: 4 [1]
Given Kudos: 212
Re: If s/t = 2, then the value of which of the following can be determined [#permalink]
1
Kudos
Bunuel in GMAT official advanced, III. t-1/s-1 not s-1/t-1

Posted from my mobile device
GMAT Club Legend
Joined: 18 Aug 2017
Posts: 7963
Own Kudos [?]: 4215 [0]
Given Kudos: 243
Location: India
Concentration: Sustainability, Marketing
GMAT Focus 1:
545 Q79 V79 DI73
GPA: 4
WE:Marketing (Energy and Utilities)
Re: If s/t = 2, then the value of which of the following can be determined [#permalink]
given
s=2t
so
I. 2t/s = solve we get 1
II. (s - t)/t = solve we get 1
III. (s - 1)/(t - 1) = no value
IMO C

gmatt1476 wrote:
If s/t = 2, then the value of which of the following can be determined?

I. 2t/s
II. (s - t)/t
III. (s - 1)/(t - 1)

A. I only
B. III only
C. I and II only
D. II and III only
E. I, II, and III

PS77602.01
Target Test Prep Representative
Joined: 14 Oct 2015
Status:Founder & CEO
Affiliations: Target Test Prep
Posts: 19130
Own Kudos [?]: 22630 [0]
Given Kudos: 286
Location: United States (CA)
Re: If s/t = 2, then the value of which of the following can be determined [#permalink]
gmatt1476 wrote:
If s/t = 2, then the value of which of the following can be determined?

I. 2t/s
II. (s - t)/t
III. (s - 1)/(t - 1)

A. I only
B. III only
C. I and II only
D. II and III only
E. I, II, and III

PS77602.01

Since s = 2t, we can substitute 2t for s in each expression:

I. 2t / 2t = 1

I is correct.

II. (2t - t) / t = 1

II is correct.

III. (2t -1) / (t - 1)

We see that different values of t will yield a different value of the expression, so III is not correct.

Math Expert
Joined: 02 Sep 2009
Posts: 94342
Own Kudos [?]: 640795 [0]
Given Kudos: 85011
Re: If s/t = 2, then the value of which of the following can be determined [#permalink]
siddharthaggarwal wrote:
Bunuel in GMAT official advanced, III. t-1/s-1 not s-1/t-1

Posted from my mobile device

_____________________
Edited. Thank you.
Senior Manager
Joined: 16 Nov 2021
Posts: 472
Own Kudos [?]: 28 [1]
Given Kudos: 5901
Location: United Kingdom
Re: If s/t = 2, then the value of which of the following can be determined [#permalink]
1
Bookmarks
BrentGMATPrepNow wrote:
gmatt1476 wrote:
If s/t = 2, then the value of which of the following can be determined?

I. 2t/s
II. (s - t)/t
III. (s - 1)/(t - 1)

A. I only
B. III only
C. I and II only
D. II and III only
E. I, II, and III

I. 2t/s
If s/t = 2, then t/s = 1/2
So, 2t/s = 2(t/s) = (2)(1/2) = 1
So we CAN determine the value of 2t/s

II. (s - t)/t
Here, we can use a nice fraction property that says: (a - b)/c = a/c - b/c
We get: (s - t)/t = s/t - t/t = s/t - 1 = 2 - 1 = 1
So we CAN determine the value of (s - t)/t

III. (s - 1)/(t - 1)
Notice that, if s/t = 2, it COULD be the case that s = 2 and t = 1
When we plug these values into the expression we get: (s - 1)/(t - 1) = (2 - 1)/(1 - 1) = 1/0, which is undefined.
So we CANNOT determine the value of (s - 1)/(t - 1)

Cheers,
Brent

BrentGMATPrepNow, For I & II, are below calculations correct too?
I, s=2t
0=2t/s

II, s=2t
s-t=2t-t
s-t = t
s-t/t = 0
Non-Human User
Joined: 09 Sep 2013
Posts: 33968
Own Kudos [?]: 851 [0]
Given Kudos: 0
Re: If s/t = 2, then the value of which of the following can be determined [#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.
Re: If s/t = 2, then the value of which of the following can be determined [#permalink]
Moderator:
Math Expert
94342 posts