A hospital laboratory needs a 10% dextrose solution. However, only 5% and 20% dextrose concentrations are in stock. How much of the 20% concentration should be mixed with 100 fl oz of the 5% concentration to get a 10% solution?
What will be an ideal response?
Let x = the amount of 20% concentration.
0.05(100) + 0.20(x) = 0.1(x + 100)
5 + 0.20x = 0.1x + 10
0.1x = 5
x = 50 fl oz
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