SOLUTION: An auto mechanic adds 25mL of water to 125mL of a 20% antifreeze solution. What is the concentration of antifreeze in the resulting mixture?

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Question 253553: An auto mechanic adds 25mL of water to 125mL of a 20% antifreeze solution. What is the concentration of antifreeze in the resulting mixture?
Answer by richwmiller(17219) About Me  (Show Source):
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0*25+.20*125=150*x
x=16.67%
We would expect the solution to be less concentrated since pure water was added.