A solution is obtained by mixing 300 g of `25%` solution and 400 g of `40%` solution by mass. Calculate the mass percentage of the resulting solution.

Explanation

300 g of `25%` solution containsd solute = 75 g
400 g of `40%` solution contains solute = 160 g
Total mass of soute `= 160 + 75 = 235g`
Total mass of solution `= 300 + 400 = 700 g`
`%` of solute in the final solution `= (235)/(700) xx 100 = 33.5%`
`%` of water in the final solution `= 100 - 33.5 = 66.5%`