The first solution contains 15% salt, and the other 20% salt. Mix 400 g of the first solution and 600 g of another

The first solution contains 15% salt, and the other 20% salt. Mix 400 g of the first solution and 600 g of another solution, determine the percentage of salt in the resulting solution.

Let’s find how much salt is in the first solution:

(15/100) * 400 = 60 g.

Let’s find how much salt is in the second solution:

(20/100) * 600 = 120 g.

Let’s find how many grams of salt are in the resulting solution. Let’s add the masses of salts in the first and second solutions:

60 + 120 = 180 g.

Let’s find the mass of the entire resulting solution. It is equal to the sum of the masses of the initial solutions:

400 + 600 = 1000 g.

Let’s find the percentage of salt in the resulting solution:

(180/1000) * 100% = 18%.

Answer: the concentration of salt in the resulting solution is 18%.