given,
cost price(CP) of the tv set = 2500/-
marked price(MP)of the tv set= 3200/-
rate of discount=10%
Total discount=3200 x10/100= 320/-
i) Selling price=3200 -320
=2880/-
ii) profit=SP-CP
=2880-2500
=380/-
profit percent= (profit x 100)/CP
=(380 x 100)/2500
=38000/2500
=380/25
=15.2% is the profit percent made by the dealer