the ratio of yes to no is 3 : 5
the ratio 3 representing 1992 votes
so 1 ratio will represent vote = 1992 / 3 = 664 votes
we have total ratio of 3 + 5 = 8 ratio
so 8 ratio will represent the vote = 8 x 664 = 5312 votes
so the total number of votes are 5312 votes