Question
In an election, two candidates A and B participated.
2⁄5 of the voters promised to vote for A and rest promised to vote for B. On the voting day 25% of the voters went back on their promise to vote for A and 30% of the voters went back on their promise to vote for B. Find the total number of voters, if B wins by 180 votes.Solution
Let the voters for A be 200 Unit And voters for B be 300 Unit 
Difference of (260 - 240) units = 180 votes 20 units = 180 votes 1 unit = 9 votes 100 units = 900 votes Voters for A = 200 units Voters for B = 300 units Total voters = 500 units Total voters = 9 X 500 = 4500 votes
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