Two liters of a 30% acid solution are mixed with three liters of a 20% acid solution. What percent of the mixture is acid?
The mixture is (30% + 20%)/2 = 25% acid.
Not quite exactly, the amounts of the solutions are different.
30% of 2 liters is .6 liters.
20% of 3 liters is .6 liters.
Total 1.2 liters of acid and 5 liters of total mixture
1.2/5 = 24%
I hope this helped. :))
=^._.^=
.30 (2) + .20 (3) = x ( 2+3)
1.2 / 5 = .24 = x or 24 % final solution
+64 
