Answer :
Valid votes for candidate 1 = 55/100x 7500 = 4125
invalid votes = 20/100x 7500 = 1500
so,the votes secured by the second candidate is = 7500 - (4125+1500) = 1825
invalid votes = 20/100x 7500 = 1500
so,the votes secured by the second candidate is = 7500 - (4125+1500) = 1825