Given: A and B were two candidates in an election. A got 55% of the total votes casted. 10% of the total population did not cast any votes. B got a total of 8100 votes. Formula used: Percentage increase/decrease = [(new value – actual value)/actual value] × 100 Calculation: Let the total population be 100x. Total no. of votes casted =(90/100)×100x=90x Total no. of votes of A =(55/100)×90x Total no. of votes of B =(45/100)×90x< br> According to question (45/100)×90x=8100 ⇒x=(8100×100)/(45×90) ⇒x=200 Total population =100×200=20000 ∴ The total population is 20000.