Problema Solution
Eight liters of an 8% bleach solution is mixed with 12 liters of another bleach solution to produce 20 liters of a 5% bleach solution. What percent bleach was the second bleach solution?
Answer provided by our tutors
total solution = 20 so 8% is 20 - 12 = 8
we get
8% * 8 + x% * 12 = 5% * 20
0.64 + x*0.12 = 1
.12x = 1 - 0.64
.12x = .36
x = .36/.12
x = 3
so its 3%