GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 21 Jan 2019, 16:53

### 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 January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
• ### GMAT Club Tests are Free & Open for Martin Luther King Jr.'s Birthday!

January 21, 2019

January 21, 2019

10:00 PM PST

11:00 PM PST

Mark your calendars - All GMAT Club Tests are free and open January 21st for celebrate Martin Luther King Jr.'s Birthday.
• ### The winners of the GMAT game show

January 22, 2019

January 22, 2019

10:00 PM PST

11:00 PM PST

In case you didn’t notice, we recently held the 1st ever GMAT game show and it was awesome! See who won a full GMAT course, and register to the next one.

# Of the 720 students at a certain university, 25 percent are

Author Message
TAGS:

### Hide Tags

Intern
Joined: 07 Jan 2013
Posts: 5
GMAT 1: 720 Q48 V38
Of the 720 students at a certain university, 25 percent are  [#permalink]

### Show Tags

Updated on: 21 Jul 2013, 00:48
1
10
00:00

Difficulty:

75% (hard)

Question Stats:

55% (01:53) correct 45% (01:19) wrong based on 220 sessions

### HideShow timer Statistics

Of the 720 students at a certain university, 25 percent are seniors. If x seniors were to graduate early and leave the university and no additional students entered or left the university, what value of x would reduce the number of seniors at the university to 20 percent?

(A) 30
(B) 36
(C) 42
(D) 45
(E) 48

Originally posted by jobeto12 on 20 Jul 2013, 18:35.
Last edited by Bunuel on 21 Jul 2013, 00:48, edited 1 time in total.
Edited the question.
Verbal Forum Moderator
Joined: 10 Oct 2012
Posts: 611
Re: Of the 720 students at a certain university, 25 percent are  [#permalink]

### Show Tags

20 Jul 2013, 22:05
4
jobeto12 wrote:
Of the 720 students at a certain university, 25 percent are
seniors. If x seniors were to graduate early and leave the
university and no additional students entered or left the
university, what value of x would reduce the number of seniors
at the university to 20 percent?

A) 30
(B) 36
(C) 42
(D) 45
(E) 48

No of seniors = $$720*\frac{1}{4}$$ = 180. Given that $$\frac{180-x}{720-x} = \frac{1}{5}$$

Thus, $$900-5x = 720 -x \to 180 = 4x \to x = 45$$.

D.
_________________
Manager
Status: folding sleeves up
Joined: 26 Apr 2013
Posts: 132
Location: India
Concentration: Finance, Strategy
GMAT 1: 530 Q39 V23
GMAT 2: 560 Q42 V26
GPA: 3.5
WE: Consulting (Computer Hardware)
Re: Of the 720 students at a certain university, 25 percent are  [#permalink]

### Show Tags

23 Sep 2014, 11:41
jobeto12 wrote:
Of the 720 students at a certain university, 25 percent are seniors. If x seniors were to graduate early and leave the university and no additional students entered or left the university, what value of x would reduce the number of seniors at the university to 20 percent?

(A) 30
(B) 36
(C) 42
(D) 45
(E) 48

Sol:

180-x= 20% of (720-x)

4x=180
x=45
Current Student
Status: DONE!
Joined: 05 Sep 2016
Posts: 374
Re: Of the 720 students at a certain university, 25 percent are  [#permalink]

### Show Tags

01 Dec 2016, 18:47
(180-x)/(720-x) = 1/5
5(180-x) = (720-x)
900-5x = 720-x
180 = 4x
x = 45

D.
Senior Manager
Joined: 21 Aug 2016
Posts: 263
Location: India
GPA: 3.9
WE: Information Technology (Computer Software)
Of the 720 students at a certain university, 25 percent are  [#permalink]

### Show Tags

02 Dec 2016, 13:29
Hi Bunuel,

Question says "what value of x would reduce the number of seniors at the university to 20 percent?"

I could not understand why everyone is considering 20% of the total student if the question says that x would reduce the number of seniors to 20%, Probably I misinterpret the question and that's why got answer 36. Please help !

If the question would be --what value of x would reduce the number of seniors at the university by 20 percent? Will this make any difference in the solution?
Non-Human User
Joined: 09 Sep 2013
Posts: 9464
Re: Of the 720 students at a certain university, 25 percent are  [#permalink]

### Show Tags

24 Dec 2018, 21:29
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.
_________________
Re: Of the 720 students at a certain university, 25 percent are &nbs [#permalink] 24 Dec 2018, 21:29
Display posts from previous: Sort by