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Mixture Problems Made Easy [#permalink]
05 May 2015, 06:28
1
This post received KUDOS
anik89 wrote:
KillerSquirrel wrote:
Mixture problems made Easy
solving mixture problems fast ! - (30 day money back guarantee )
see attachment
Thanks
i did not understand even a single strategy .. would you please simplify any one of them with the image structure??
I'll break down the first question for you.
My personal opinion is that a time line is easier than 4 arrows, but that's just a preference.
(1) Consider a straight line (see image below)
(2) Put the respective ratios on each side of the spectrum
(3) Put 45% between "30" and "50" (the goal of the solution is to mix 30% and 50% and get 45%, right?)
So, 45 is somewhere between 30 and 50. How far is 45 from 30? 15 "steps"
How far is 45 from 50? 5 "steps"
Now, to find the ratio, you simply flip the respective number. 15:5 becomes: 5:15 or simplified to 1:3. So, you use 1 "part" of 30% and 3 "parts" of 45.
Re: Mixture Problems Made Easy [#permalink]
09 Jul 2010, 03:40
once you get the hang of these questions and practice a few they are pretty straightforward. The trick is trying to work out what the question is getting at!
Re: Mixture Problems Made Easy [#permalink]
16 Jul 2010, 06:17
one of the best posts on the website - thanks a lot. This makes these problems like child's play. I wouldn't be surprised if some company TMs this technique if hasn't already.
Re: Mixture Problems Made Easy [#permalink]
23 Sep 2010, 14:45
Quick question.
In the Example 5, the explanation says that the volume of the new solution is x/2. If one amount of solution replaces the same amount, how is the volume of the new solution cut in half? If I take out 1 liter of solution and replace it with 1 liter of another solution, my overall volume stays the same. Could someone please explain the assumption that the volume is x/2.
Thanks! _________________
The Brain Dump - From Low GPA to Top MBA(Updated September 1, 2013) - A Few of My Favorite Things--> http://cheetarah1980.blogspot.com
gmatclubot
Re: Mixture Problems Made Easy
[#permalink]
23 Sep 2010, 14:45
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