The income of a household rises by 10%, the demand for washing machine rises by 20%. This means washing machines (in Economics) is a/an _________.
The marked price of a washing machine is Rs.15000. A dealer allows two successive discounts of 20% and 10% on the marked price. How much I have to pay for the washing machine?
Reena bought a washing machine for ₹ 9800 including tax of 10%. Find the price of the washing machine before VAT was added.