College Teachers

[This topic has 2 member replies]
Forum Index GMAT Math Data Sufficiency
Free $100 Amazon.com Gift Card - Buy a GMAT course using a Beat The GMAT discount code between Mar 8-22 and get a $100 Amazon.com Gift Card. Learn more!
Post New Topic   Post Reply

chipbmk
Rising GMAT Star

Default Avatar

Joined: 05 Oct 2009
Posts: 70

Thanks given: 8
Thanked 0 times in 0 posts
Topic: College Teachers
PostTue Nov 17, 2009 11:09 pm
Elapsed Time:
00:00
 Lap   Why a timer is critical to improving your score
Of 1400 college teachers surveyed, 42% said they considered research essential. How many teachers surveyed were women?

a. In survey 36% of men and 50% of women said they considered research essential
b. 288 men said they considered research essential


OA: A

I understand in theory why the answer is what it is, but if someone could show me proof of it (even though I know solving in DS is unnecessary), I would appreciate it!

Thanks!
Back to top
View user's profile Send private message
palvarez
Really wants to Beat The GMAT!

Default Avatar

Joined: 24 Oct 2009
Posts: 199

Thanks given: 3
Thanked 19 times in 17 posts

GMAT Score: 710
PostWed Nov 18, 2009 12:02 am
Set up a grid, which makes your life easier.

Two sets: Research, male

Research and not-research are complementary. Use this to name two columns or two rows.
male and female are complementary. Use this to name two rows or two colums.
Back to top
View user's profile Send private message
Kalvin
Just gettin' started!

Default Avatar

Joined: 13 Nov 2009
Posts: 9

Thanks given: 0
Thanked 0 times in 0 posts
PostWed Nov 18, 2009 7:27 pm
Two equations:

x=men
y=women
total=1400
research essential = 1400 * .42 = 588


Eq 1 => x + y = 1400

and

Eq 2 => .36x + .5y = 588

Solve for y
Back to top
View user's profile Send private message
Display posts from previous:   

Post New Topic   Post Reply All times are GMT - 7 Hours
Page 1 of 1
 
Forum Index GMAT Math Data Sufficiency
Most Active Members in Last 30 Days
1. harsh.champ 621 posts
2. shashank.ism 430 posts
3. ajith 342 posts
4. thephoenix 337 posts
5. money9111 332 posts
See More Top Beat The GMAT Members
Most Active Experts in Last 30 Days
1. lunarpower
Manhattan GMAT Teacher 		85 posts
2. Stuart Kovinsky
Kaplan GMAT Teacher 		71 posts
3. Lisa Anderson
Stacy Blackman Consulting 		50 posts
4. Testluv
Kaplan GMAT Teacher 		50 posts
5. Bryant@VeritasPrep
Veritas Prep 		30 posts
See More Top Beat The GMAT Experts