Solve the problem.Chandra has 3 liters of a 28% solution of sodium hydroxide in a container. What is the amount and concentration of sodium hydroxide solution she must add to this in order to end up with 7 liters of 16% solution?

A. 4 liters of 7% solution
B. 4 liters of 5% solution
C. 4 liters of 8% solution
D. 4 liters of 10% solution

Answer: A

Mathematics

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