The price of tea being increased by 20%, a man reduces his consumption by 20%. By how much percent will his expenses for tea be decreased?
সমাধান
সঠিক উত্তর: Option B
Let original consumption = 100 units And original price = 100 taka per unit. Original expenditure = . (100 × 100) = 10000 taka New expenditure = (120 × 80) =9600 Taka So ,decrease in price = (10,000 -9600)/10,000 X 100 =4 %
