Solve the problem.In a chemistry class, 5 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
A. 2.5 liters
B. 5 liters
C. 1.5 liters
D. 3.5 liters
Answer: A
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