SOLUTION: "A pharmacist combined some 10% saline solution with some 15% saline solution to produce 100 ml of a 12% solution. How much of the 10% solution did the pharmacist use?" Need help o
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Question 775449: "A pharmacist combined some 10% saline solution with some 15% saline solution to produce 100 ml of a 12% solution. How much of the 10% solution did the pharmacist use?" Need help on percentage, please and thanks. Answer by sofiyac(983) (Show Source):
You can put this solution on YOUR website! lets say we take x ml of 10% solution, since total ml is 100 then we have 100-x of 15% solution, so
10x+15(100-x)=(100)(12)
10x+1500-15x=1200
-5x+1500=1200 subtract 1500 from each side
-5x=-300 divide each side by -5
x=60 so we need 60 ml of 10% and 100-60=40ml of 15%
