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.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

All of the 540 people who attended an education convention [#permalink]

Show Tags

28 Mar 2013, 12:48

2

This post received KUDOS

3

This post was BOOKMARKED

00:00

A

B

C

D

E

Difficulty:

35% (medium)

Question Stats:

74% (03:20) correct
26% (02:11) wrong based on 242 sessions

HideShow timer Statictics

All of the 540 people who attended an education convention were either teachers or administrators. There were twice as many females as males at the convention and 3 times as many teachers as administrators. If 1/3 of the administrators were males, how many of the females were teachers?

Re: All of the 540 people who attended an education convention [#permalink]

Show Tags

28 Mar 2013, 13:15

5

This post received KUDOS

Expert's post

megafan wrote:

All of the 540 people who attended an education convention were either teachers or administrators. There were twice as many females as males at the convention and 3 times as many teachers as administrators. If 1/3 of the administrators were males, how many of the females were teachers?

(A) 90 (B) 135 (C) 180 (D) 270 (E) 405

Looking for a 30-sec approach.

Total = 540 people.

Twice as many females as males --> (Female) = 360 and (Males) = 180.

3 times as many teachers as administrators --> (Teachers) = 405 and (Administrators) = 135.

1/3 of the administrators were males --> (Male Administrators) = 135*1/3 = 45.

Re: All of the 540 people who attended an education convention [#permalink]

Show Tags

28 Mar 2013, 23:34

megafan wrote:

All of the 540 people who attended an education convention were either teachers or administrators. There were twice as many females as males at the convention and 3 times as many teachers as administrators. If 1/3 of the administrators were males, how many of the females were teachers?

(A) 90 (B) 135 (C) 180 (D) 270 (E) 405

Looking for a 30-sec approach.

Given:

1. No.of people = 540 2. No of males =x, no of females = 2x 3. No of administrators=y, no of teachers = 3y 4. y/3 = male administrators and 2y/3 = female administrators

Question

No of Female teachers?

= Number of Females - Number of Female administrators

= 2x-2y/3

Deductions

1. x + 2x = 540 or x=180. 2. y + 3y = 540 or y=135.

Re: All of the 540 people who attended an education convention [#permalink]

Show Tags

29 Mar 2013, 03:36

1

This post received KUDOS

johnwesley wrote:

SravnaTestPrep, maybe it's much faster doing the grid, isn't it? The grid helps to avoid doing calculations that you don't need and gain seconds.

Yes johnwesley, the grid method is faster. But if it is possible to adopt a more or less uniform approach to problems, you may gain on the average. _________________

Re: All of the 540 people who attended an education convention [#permalink]

Show Tags

27 Feb 2014, 17:49

1

This post received KUDOS

Expert's post

1

This post was BOOKMARKED

one way to solve in 30 secs is if you can make the below connection very quickly:

Females comprise 2/3 of conference Females comprise 2/3 of admin, so they must also comprise 2/3 of teachers (so female teachers comprise 2/3*3/4 = 1/2 of conference) _________________

Re: All of the 540 people who attended an education convention [#permalink]

Show Tags

23 Dec 2015, 14:35

Bunuel wrote:

megafan wrote:

All of the 540 people who attended an education convention were either teachers or administrators. There were twice as many females as males at the convention and 3 times as many teachers as administrators. If 1/3 of the administrators were males, how many of the females were teachers?

(A) 90 (B) 135 (C) 180 (D) 270 (E) 405

Looking for a 30-sec approach.

Total = 540 people.

Twice as many females as males --> (Female) = 360 and (Males) = 180.

3 times as many teachers as administrators --> (Teachers) = 405 and (Administrators) = 135.

1/3 of the administrators were males --> (Male Administrators) = 135*1/3 = 45.

Make a matrix:

Attachment:

Teachers.png

So, (Female Teachers) = 270.

Answer: D.

how did you immediately get 360 and males 180?

gmatclubot

Re: All of the 540 people who attended an education convention
[#permalink]
23 Dec 2015, 14:35

So, my final tally is in. I applied to three b schools in total this season: INSEAD – admitted MIT Sloan – admitted Wharton – waitlisted and dinged No...

HBS alum talks about effective altruism and founding and ultimately closing MBAs Across America at TED: Casey Gerald speaks at TED2016 – Dream, February 15-19, 2016, Vancouver Convention Center...