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-A nurse mixes 90 cc of a 45% saline solution with a 10% saline solution to produce a 20% saline solution. How much of the 10% solution should he use?
A) 18 cc
B) 180 cc
C) 225 cc
D) 202.5 cc

Question

Quizplus · Accepted Answer

To find the amount of 10% solution needed, use the equation: 0.45(90) + 0.10(x) = 0.20(90 + x). Solving for x gives x = 225 cc.

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