A family spends on groceries, rent, and other expenses in the ratio 3 : 5 : 2. Next year, groceries are expected to rise by 8%, rent by 4%, and other expenses to fall by 10%. What will be the overall percentage change in total expenditure?

উত্তর দেখান ও ব্যাখ্যা

উত্তর: (B) 2.4% increase

ব্যাখ্যা

3×1.08 + 5×1.04 + 2×0.90 = 10.24 against 10, a 2.4% increase.