Question 1159811
end up with 150 ml *0.24=36 ml pure vinegar 
start with x amount of .05 vinegar for 0.05x
add 150-x amount of 1.00 vinegar for 150-x
so 0.05x+150-x=36
-.95x=-114
x=120 ml of the 5% (6 ml pure)
150-x or 30 ml of the vinegar (or 30 ml pure)