MIXTURE PROBLEM HELP

We have a free video on the topic of mixtures - https://www.gmatprepnow.com/module/gmat- ... /video/931
Here's a practice question: https://www.gmatprepnow.com/module/gmat- ... /video/932

Also, weighted averages can be thought of a mixtures. For more information on weighted averages, you can watch this free video: https://www.gmatprepnow.com/module/gmat- ... ics?id=805

Cheers,
Brent

Thanks a lot Bunuel,

but there is a single method to approach and solve mixture problem?
I mean, e.g. for rate problems, you have to use the formula rtae=distance/time: does exists a similar formula (or method) thanks to which I am able to solve straightforward mixture questions?

Thanks a lot!!!!

Hi pepo,

Where did you hear that 'Mixture' questions count so much? Questions that would be strictly defined as Mixture questions (re "a 20% nut mixture is combined with a 30% nut mixture to form a 26% nut mixture...." and not Ratio/Percent/Average questions) typically show up just 1-2 times on Test Day, so that question type does NOT represent a big category on the GMAT.

If you have any specific prompts that you'd like to discuss, then you should post them in the appropriate Quant Forums. Most Mixture questions are essentially just about doing the necessary algebra/arithmetic, but you can sometimes use Tactics (TEST VALUES or TEST THE ANSWERS) to answer those types of questions.

GMAT assassins aren't born, they're made,
Rich

There is a single approach that can help you solve most weighted average and mixture problems easily. It uses this formula

w1/w2 = (A2 - Aavg)/(Aavg - A1)

Check out these posts for a discussion on this formula and its application to mixtures.

Weighted Avg and Mixtures:
https://anaprep.com/arithmetic-weighted-averages/
https://anaprep.com/arithmetic-mixtures/
and these videos:
https://www.youtube.com/watch?v=_GOAU7moZ2Q
https://www.youtube.com/watch?v=VdBl9Hw0HBg

Hi Rich,

I heard about that in your course (Empower gmat).
You says that beacuse these questions are easye because you have just to use simple algebra, they count...

Hi pepo,

Yes, Mixture questions almost certainly will count towards your score, but the 'scale' of how much they will help/harm your overall score is LIMITED by the fact that you'll see so few of them. By comparison, your performance on other, larger categories should take precedence - since those larger categories impact your score so much more. For example, DS will have a HUGE impact on your score (since there are so many DS questions that you'll see). Easy-to-answer questions, as a group, will also count "a lot" towards your score (which is why every Test Taker needs to eliminate silly/little mistakes from their performance), but an individual Mixture question won't kill your score if you get it wrong.

GMAT assassins aren't born, they're made,
Rich

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