It is currently 14 Dec 2017, 20:38

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

27 percent of the students at a certain school are boys who are enroll

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4476

Kudos [?]: 3155 [0], given: 0

GPA: 3.82
Premium Member
27 percent of the students at a certain school are boys who are enroll [#permalink]

Show Tags

New post 17 Nov 2017, 00:27
Expert's post
1
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

65% (02:05) correct 35% (01:26) wrong based on 46 sessions

HideShow timer Statistics

[GMAT math practice question] 11.17

27 percent of the students at a certain school are boys who are enrolled in an advanced math class. If 60 percent of the boys at the school are enrolled in the advanced math class, what percentage of all students at the school
are boys?

A. 25%
B. 30%
C. 35%
D. 40%
E. 45%
[Reveal] Spoiler: OA

_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo


Last edited by MathRevolution on 18 Nov 2017, 15:47, edited 1 time in total.

Kudos [?]: 3155 [0], given: 0

Expert Post
Math Expert
User avatar
D
Joined: 02 Aug 2009
Posts: 5352

Kudos [?]: 6132 [0], given: 121

Re: 27 percent of the students at a certain school are boys who are enroll [#permalink]

Show Tags

New post 17 Nov 2017, 07:34
MathRevolution wrote:
[GMAT math practice question] 11.17

27 percent of the students at a certain school are boys who are enrolled in an advanced math class. If 40 percent of the boys at the school are enrolled in the advanced math class, what percentage of all students at the school
are boys?

A. 25%
B. 30%
C. 35%
D. 40%
E. 45%



Hi..
answer is not in choices..
let total be t and boys be b..
Quote:
27 percent of the students at a certain school are boys who are enrolled in an advanced math class = 40 percent of the boys at the school are enrolled in the advanced math class

\(\frac{27t}{100}=\frac{40b}{100}........\frac{b}{t}=\frac{27}{40}\)
so in % = \(\frac{27}{40}*100=67.5%\)
_________________

Absolute modulus :http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html

Kudos [?]: 6132 [0], given: 121

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4476

Kudos [?]: 3155 [0], given: 0

GPA: 3.82
Premium Member
Re: 27 percent of the students at a certain school are boys who are enroll [#permalink]

Show Tags

New post 18 Nov 2017, 15:50
chetan2u wrote:
MathRevolution wrote:
[GMAT math practice question] 11.17

27 percent of the students at a certain school are boys who are enrolled in an advanced math class. If 40 percent of the boys at the school are enrolled in the advanced math class, what percentage of all students at the school
are boys?

A. 25%
B. 30%
C. 35%
D. 40%
E. 45%



Hi..
answer is not in choices..
let total be t and boys be b..
Quote:
27 percent of the students at a certain school are boys who are enrolled in an advanced math class = 40 percent of the boys at the school are enrolled in the advanced math class

\(\frac{27t}{100}=\frac{40b}{100}........\frac{b}{t}=\frac{27}{40}\)
so in % = \(\frac{27}{40}*100=67.5%\)


The percentage of the boys enrolled in the advanced math class is fixed to 60%.
Sorry about the confusion.
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 3155 [0], given: 0

Expert Post
Math Revolution GMAT Instructor
User avatar
P
Joined: 16 Aug 2015
Posts: 4476

Kudos [?]: 3155 [0], given: 0

GPA: 3.82
Premium Member
Re: 27 percent of the students at a certain school are boys who are enroll [#permalink]

Show Tags

New post 19 Nov 2017, 17:33
Attachment:
11.20.png
11.20.png [ 3.16 KiB | Viewed 206 times ]


\((\frac{45s}{100s})*100 = 45 %\)

Therefore, the answer is E.


Answer : E
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
Find a 10% off coupon code for GMAT Club members.
“Receive 5 Math Questions & Solutions Daily”
Unlimited Access to over 120 free video lessons - try it yourself
See our Youtube demo

Kudos [?]: 3155 [0], given: 0

Re: 27 percent of the students at a certain school are boys who are enroll   [#permalink] 19 Nov 2017, 17:33
Display posts from previous: Sort by

27 percent of the students at a certain school are boys who are enroll

  new topic 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 | Emoji artwork provided by EmojiOne

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®.