Question

How many gallons of a 3% salt solution must be mixed with a 7% salt solution to obtain 100 gallons of a 5% salt solution?

O 50 gal of 3%
75 gal of 3%
O 25 gal of 3%
60 gal of 3%

Answer 1

You need to add 50 gallons of the 3% solution to the 50 gallons of the 7% solution and that will give 100 gallons of a 5% solution.