In an election survey, 83 ?% of total voters took part in survey, 50% then claims to votes for candidate A, 10% are uncertain & rest says to vote for B. If all of them voted according to their commitments on the day of election and those who were not part of survey, voted to A and B in ratio of 2 : 1. All the people who are uncertain in survey, voted to A : B in the ratio of 1 : 4 in election. If A won by 640 votes then find total number of votes in election