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test 38 #16

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test 38 #16

by dunkin77 » Mon Apr 30, 2007 11:41 pm
Hi,

I think I've seen this problem but can't remember the solution. Can anyone help?
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by Cybermusings » Tue May 01, 2007 9:05 am
formula here is{ [40x/100 + 25y/100] / x+y }*100 = 30

10x = 5y
or x/y = 5/10 = 1/2
= 50%
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by dunkin77 » Tue May 01, 2007 3:07 pm
Thank you for your response ....but the answer seems to be B). :(
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by jayhawk2001 » Tue May 01, 2007 9:09 pm
From the question, we know that the resulting mixture contains
30% Ryegrass. So,

.4X + .25Y = .3 (X+Y)
.1x = .05Y
Y = 2X

We are asked to find X / (X+Y) = X / 3X = 1/3

This is 33 1/3%
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