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gmat prep : difficult one i guess

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by aakash82 » Fri Jun 27, 2008 7:31 pm
hey guys,

im not able to understand this problem, can anyone help
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by pandeyvineet24 » Fri Jun 27, 2008 8:45 pm
The combined fat for all the 3 different kinds of milk, gives the following equation.

x + 2y + 3z = 1.5 (x + y + z)

Solve this equation.

2y - 1.5y + 3z - 1.5z = 0.5x
5y + 15z = 5x

y + 3z = x (Which is Option A)
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by ksh » Sat Jun 28, 2008 5:25 am
Hi Akash,

we need to represent three solutions in terms of their percentage as follows:

1(x)+2(y)+3(z)=1.5(x+y+z)
0.5x=0.5y+1.5z
multiply botth sides by 2
x=y+3z which is choice A

Hope you get it
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by aakash82 » Sat Jun 28, 2008 5:34 am
ksh wrote:Hi Akash,

we need to represent three solutions in terms of their percentage as follows:

1(x)+2(y)+3(z)=1.5(x+y+z)
0.5x=0.5y+1.5z
multiply botth sides by 2
x=y+3z which is choice A

Hope you get it
ohhh!!! this was so easy but just cudnt comprehend it ... thnks guys
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