Question 1055238


Nicolas mixes three solutions of acid with concentrations of 10%, 15%, and 5%. He wants to make 30 L of a mixture that is 12% acid and he uses four times as much of the 15% solution as the 5% solution. How much each of the three solutions must he use?
<pre>Correct answers: {{{highlight_green(matrix(3,7, Amount, of, "5%", to, "mix:", 4, L, Amount, of, "10%", to, "mix:", 10, L, Amount, of, "15%", to, "mix:", 16, L))}}}
Again, IGNORE THE OTHER PERSON'S USUAL ERRONEOUS solution, if it can be called a solution!