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A problem with an evasive grip

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A problem with an evasive grip  [#permalink]

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New post 28 Jul 2018, 07:16
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Seed mixture X is 40 percent ryegrass and 60 percent bluegrass by weight; seed mixture Y is 25 percent ryegrass and 75 % fescue. If a mixture of X and Y contains 30% ryegrass, what percent of the weight of the mixture is X?

A. 10%
B. 33 1/3%
C. 40%
D. 50%
E. 66 2/3%



What really is the fundamental principle tested in the above OG question? I've seen so many great looking solutions on it, which shamefully haven't made any clear sense to me bcos I couldn't apply them myself. Pls can someone give me a link or solution that shows the fundamental principle(s) being tested. Or help explain it to me as though you're explaining it to an idiot.
Thanks in advance.

[size=80][b][i]Posted from my mobile device[/i][/b][/size]
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Joined: 02 Sep 2009
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Re: A problem with an evasive grip  [#permalink]

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New post 28 Jul 2018, 07:19
S1937 wrote:
Seed mixture X is 40 percent ryegrass and 60 percent bluegrass by weight; seed mixture Y is 25 percent ryegrass and 75 % fescue. If a mixture of X and Y contains 30% ryegrass, what percent of the weight of the mixture is X?

A. 10%
B. 33 1/3%
C. 40%
D. 50%
E. 66 2/3%



What really is the fundamental principle tested in the above OG question? I've seen so many great looking solutions on it, which shamefully haven't made any clear sense to me bcos I couldn't apply them myself. Pls can someone give me a link or solution that shows the fundamental principle(s) being tested. Or help explain it to me as though you're explaining it to an idiot.
Thanks in advance.

Posted from my mobile device


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Re: A problem with an evasive grip &nbs [#permalink] 28 Jul 2018, 07:19
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