Question 1046199
Let n be the amount of 20% solution. Then:
.2n+.15(50-n)=.18(50)
.05n+7.5=9
.05n=1.5
n=30
You need 30ml of 20% solution, and 20ml of 15% solution to make 50ml of 18% solution. &#9786;&#9786;&#9786;&#9786;