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Mix 10 L of 20% acid with 30 L of 60% acid; final %:

A40%
B50%
C45%
D55%
Answer & Solution
Correct answer: B. 50%
1. Acid = 2 + 18 = 20. 2. 20/40 = 50%. _Source: 501-GMAT-Questions Section 4 / Manhattan Quant Bank_
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