MIXTURE FORMULA

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lawalx: Senior | Next Rank: 100 Posts; Posts: 42; Joined: Tue Nov 06, 2007 10:39 am

by lawalx » Sun Nov 25, 2007 1:41 am

I used to knw a simple formula for solving 'mixture problems' - all one had to do was jst plug in the values. does ne1 know this formula. pls hlp.

regards

lawalx

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Source: Beat The GMAT — Quantitative Reasoning | Sun Nov 25, 2007 1:41 am

gabriel: Legendary Member; Posts: 986; Joined: Wed Dec 20, 2006 11:07 amFollowed by: 1 member; Location: India; Thanked: 51 times

Re: MIXTURE FORMULA

by gabriel » Sun Nov 25, 2007 3:00 am

lawalx wrote:I used to knw a simple formula for solving 'mixture problems' - all one had to do was jst plug in the values. does ne1 know this formula. pls hlp.

regards

lawalx

Its called alligation ... it helps a lot in solving Mixture related problems, its very easy to understand .. just Google it , you should get plenty of articles on it, if you don't understand them let me know.

Regards

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xcise_science: Master | Next Rank: 500 Posts; Posts: 106; Joined: Tue Oct 09, 2007 12:25 pm; Thanked: 1 times

by xcise_science » Mon Nov 26, 2007 8:53 am

Hi, I got this from mgmat, its not really a formula, it involves drawing a table
I find it very useful and supereasy; just plug in your values and add!

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GMATDUD: Senior | Next Rank: 100 Posts; Posts: 62; Joined: Tue Jan 16, 2007 9:40 am; Location: Arlington,VA

by GMATDUD » Mon Dec 10, 2007 1:34 pm

gabrial,

trying to understand how to extend the formula to 3 solution mixture. I remember getting a question with 3 different fat contents mixed to to obtain a desired outcome.

any inputs with a 3 solution mixture problem

thanks
T

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xcise_science: Master | Next Rank: 500 Posts; Posts: 106; Joined: Tue Oct 09, 2007 12:25 pm; Thanked: 1 times

by xcise_science » Mon Dec 10, 2007 8:09 pm

Hi,
I believe it should still work the same. You would just need to add an additional row & column for the extra item.
Is the question from any of the OGs?

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GMATDUD: Senior | Next Rank: 100 Posts; Posts: 62; Joined: Tue Jan 16, 2007 9:40 am; Location: Arlington,VA

by GMATDUD » Mon Dec 10, 2007 10:14 pm

Can you demonstrate with an example? I did not understand that grid in the picture.

If you can solve a 2 solutions question , I will try and implement on a 3 sol mixture.

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xcise_science: Master | Next Rank: 500 Posts; Posts: 106; Joined: Tue Oct 09, 2007 12:25 pm; Thanked: 1 times

by xcise_science » Tue Dec 11, 2007 7:54 am

Hi
I've attached 2 questions, hope its clear.

I couldn't find one with a 3 solution mixture.

Attachments

mixture.doc: (38 KiB) Downloaded 559 times

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Poornima: Newbie | Next Rank: 10 Posts; Posts: 9; Joined: Fri Dec 28, 2007 11:29 amFollowed by: 1 member

Mixture Formula from Kaplan

by Poornima » Thu Mar 20, 2008 4:56 pm

This was a formula I came across in Kaplan and it seems to work with all the mixture problems I have encountered so far.

(percent diff b/w the desired soln and the weaker soln) * (amt of weaker soln) = (percent diff b/w the stronger soln and the desired soln) * (amt of stronger soln)

Hope that helps!

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clarence57: Newbie | Next Rank: 10 Posts; Posts: 1; Joined: Sun Mar 30, 2008 7:28 am

this might help you

by clarence57 » Sun Mar 30, 2008 7:32 am

p1v1=p2v2

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pierce22884: Junior | Next Rank: 30 Posts; Posts: 13; Joined: Sun Sep 07, 2008 4:34 pm; Location: Dallas, TX

by pierce22884 » Fri Feb 19, 2010 5:59 pm

Poornima wrote:This was a formula I came across in Kaplan and it seems to work with all the mixture problems I have encountered so far.

(percent diff b/w the desired soln and the weaker soln) * (amt of weaker soln) = (percent diff b/w the stronger soln and the desired soln) * (amt of stronger soln)

Hope that helps!

Can you apply that to xcise_science work problems so that I can see exactly what your talking about.

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shashank.ism: Legendary Member; Posts: 1022; Joined: Mon Jul 20, 2009 11:49 pmFollowed by: 2 members; Location: Gandhinagar; Thanked: 41 times

by shashank.ism » Sat Feb 20, 2010 11:15 am

xcise_science wrote:Hi, I got this from mgmat, its not really a formula, it involves drawing a table
I find it very useful and supereasy; just plug in your values and add!

ACTUALLY IN THIS CASE YOU NEED TO SOLVE THE PROBLEM THIS WAY

(40 x x + 60 x y )/100
where x and y are the quantities in each and 40 and 60 represents the percentage....
I have found many problems related to mixture in various post....go through it ..it willl really help..

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