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Thread: Mixtures question from GMAT PREP - 700+ level question -Need Help

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    Mixtures question from GMAT PREP - 700+ level question -Need Help

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    I don' understand how both are sufficient, any thoughts?



    Thank you in advance for your help!
    Attached Thumbnails Attached Thumbnails Mixtures question from GMAT PREP - 700+ level question -Need Help-mixture-gmatprep-problem.jpg  

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    Within my grasp! iisan's Avatar
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    x + y = z ---------------(1)
    0.1x + 0.02y = 0.05z ----(2)

    i. y = 10 ---------(3)
    3 eqns, 3 unknowns. Solvable
    (SUFF)

    ii. z = 16 ---------(4)
    3 eqns, 3 unknowns. Solvable
    (SUFF)

    Ans D.
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    Grrr... arjmen's Avatar
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    x/y = (5-2)/(10-5) = 3/5 ---> Eq.1
    x/z = x/(x+y) = 3/8 ---> Eq.2

    I: Suff
    II: Suff
    Last edited by arjmen; 07-14-2006 at 06:42 AM.

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    Eager! vishalsoft's Avatar
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    D it is

    10 %of x+2%of y=5%of z where Z is x+Y

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    Thank you everyon!!

    I must be knee deep in material because that was soooo incredibly simple....I just did not see it....how didn't I see that?

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