Question
9-11
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Solution X contains only ingredients a and b in a ratio of 2 : 3. Solution Y contains only ingredients a and b in a ratio of 1 : 2. If Solution Z is created by mixing solutions X and Y in a ratio of 3 : 11, then 630 ounces of Solution Z contains how many ounces of a ?
A.68
B.73
C.89
D.219
E.236
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