Calculate the percentage composition of a solution obtained by mixing 200 g of a `20%` and 300 g of a `30%` solution by weight.

Explanation

To calculate the percentage composition of the solution obtained by mixing 200 g of a 20% solution and 300 g of a 30% solution by weight, follow these steps:

### Step 1: Calculate the mass of solute in the 20% solution
- Given: 200 g of a 20% solution
- The mass of solute = (Percentage concentration × Total mass of solution) / 100
- Mass of solute from 20% solution = (20 × 200) / 100 = 40 g

### Step 2: Calculate the mass of solute in the 30% solution
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