Ratio and proportion math
by J. Doe
On Free practice test #4, Question #8 - I need help with this question:
Two solutions are combined in a 3:1 ratio to make a custom compounded solution. How many of each is required to make 200mL of this mixture?
A. 125mL : 75mL
B. 210mL : 90mL
C. 120mL : 80mL
D. 150mL : 50mL
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