Total number of votes = 7500, number of invalid votes = 7500*(20/100) = 1500, number of valid votes = 7500 - 1500 = 6000, number of votes are gotten by 1st candidate = 6000*(55/100) = 3300, number valid votes are gotten by 2nd candidate = 6000 - 3300 = 2700, then the answer is 2700.
27000