Find all School-related info fast with the new School-Specific MBA Forum

It is currently 30 Sep 2014, 01:48

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Percentage

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Senior Manager
Senior Manager
User avatar
Joined: 25 Dec 2003
Posts: 360
Location: India
Followers: 1

Kudos [?]: 14 [0], given: 0

Percentage [#permalink] New post 13 Jul 2004, 08:24
Perhaps, i wud have asked this question before, tried for a search, cud not get it, Hence I post it here.

In a group of people, there are 50% of men who are below age 40. And 40% of the females are below 40.. If the total people below the age below 40 are 42% of the people, Then how many percent of females are there in total.

please explain answers
_________________

Giving another SHOT

Senior Manager
Senior Manager
avatar
Joined: 19 May 2004
Posts: 291
Followers: 1

Kudos [?]: 5 [0], given: 0

 [#permalink] New post 13 Jul 2004, 08:41
M - Number of Men.
W - Number of Women.

1 ) M+W = 100. (100%... Easier to work with a number)

42% - are people under 40.

2) 0.5M + 0.4W = 42.

Solving those two equations i got W= 80.
CIO
CIO
User avatar
Joined: 09 Mar 2003
Posts: 466
Followers: 1

Kudos [?]: 26 [0], given: 0

 [#permalink] New post 13 Jul 2004, 08:59
I agree with Dookie - it's 80%. I have a non-algebra approach that works for this exact problem.

Draw a quick diagram putting all the percentages together that looks like this:

40------42-----------50
W_____t_________M


Then see what the differences are between all the numbers and the middle:

40------42-----------50
W__2__t_____8___M


Now make a ratio using the opposite differences:

w:m = 8:2

so w:whole = 8:10 = 80%

It looks like a lot when it's typed out like this, but see the attachment for how simple it is:
Image

This works for every question where they give you the percentage of two distinct groups, and then the combined percentage as well.
Senior Manager
Senior Manager
User avatar
Joined: 25 Dec 2003
Posts: 360
Location: India
Followers: 1

Kudos [?]: 14 [0], given: 0

 [#permalink] New post 13 Jul 2004, 09:02
Dookie, can u explain a little in detail, please.

Thanks bro.
_________________

Giving another SHOT

Manager
Manager
avatar
Joined: 16 Jan 2004
Posts: 65
Location: NJ
Followers: 1

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

 [#permalink] New post 13 Jul 2004, 11:19
0.5M + 0.4F =0.42(M+F)

solve

F/M = 8/2. Hence 80%
Manager
Manager
avatar
Joined: 19 Jun 2003
Posts: 151
Followers: 1

Kudos [?]: 4 [0], given: 0

 [#permalink] New post 13 Jul 2004, 20:05
m > men
w > women
t > total

m + w = t
50/100 * m + 40/100 * w = 42/100 * t

This results in w/t = 4/5 ..which equals %80

Hope this is clear!


:fyi
Senior Manager
Senior Manager
User avatar
Joined: 25 Dec 2003
Posts: 360
Location: India
Followers: 1

Kudos [?]: 14 [0], given: 0

 [#permalink] New post 16 Jul 2004, 07:06
Ian, i am unable to see any attachements. Can u please resend them?.

Thanks mate.
_________________

Giving another SHOT

SVP
SVP
User avatar
Joined: 16 Oct 2003
Posts: 1816
Followers: 4

Kudos [?]: 37 [0], given: 0

 [#permalink] New post 16 Jul 2004, 07:28
80 percent


m + f = 100
0.5m + o.4f = 42
  [#permalink] 16 Jul 2004, 07:28
    Similar topics Author Replies Last post
Similar
Topics:
percentage kairoshan 5 22 Aug 2009, 19:27
Experts publish their posts in the topic percentage vannu 2 22 Jul 2009, 19:07
17 Experts publish their posts in the topic Last year the price per share of Stock X increased by k perc milind1979 8 25 Mar 2009, 22:06
Percentage usman7 3 16 Dec 2006, 06:37
Percentage lan583 3 16 Aug 2006, 16:14
Display posts from previous: Sort by

Percentage

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.