Ratio of their incomes =3:4:5 Ratio of their interests =6:5:4 Therefore, the ratio of their interest income
=(3×6):(4×5):(5×4)=18:20:20
Let the interest incomes of Amala, Bina, and Gouri be 18x,20x, and 20x respectively. Given, Bina's interest income exceeds Amala's by Rs 250 Therefore, 20x−18x=2x=250 Or x=125 Total interest incomes