Problema Solution
A biochemist has two alcohol solutions. One is 20% alcohol solution and the other is a 50% alcohol solution. She needs 12L of a solution that is 45% alcohol. How many liters of each of the original solutions should she mix?
Answer provided by our tutors
0.2x + 0.5y = 5.4
x + y = 12
Solving we get x = 2, y = 10
we should mix 2 L of 20% and 10L of 50%