Question

Two solutions of milk and water are mixed in the
ratio 3:7The first solution contains 20% milk and
second solution contains 30% milk. Find the
concentration of milk in the final mixture.​

Answer 1

Answer:27%

Step-by-step explanation:

Let the total solution be 100 litres then first solution (having 20% milk) is in 3:7 so 100×3/10= 30 litres

And second solution (having 30% milk) = 100×7/10 = 70 litres

Quantity of milk in first solution =30 litres × 20% = 6 litres

And quantity of milk in second solution = 70 litres × 30% = 21 litres

Total quantity of milk in 100 litres solution is 6+21 = 27 litres

So Percentage is 27×100/100= 27%