In an election between two candidates, 85% of the voters cast their votes, out which 4% of the votes were declared invalid. A candidate got 6936 votes which were 85% of the valid votes. Find the total number of voters enrolled in that election.

Solution (By Examveda Team)

$$\eqalign{ & 72.25\mu \to 6936 \cr & 100\mu \to \frac{{6936 \times 100}}{{72.25}} \cr & 100\mu \to 9600 \cr & \Rightarrow {\text{Valid votes }}96\mu \to 9600 \cr & 1\mu \to 100 \cr & 100\mu \to 10000{\text{ Answer}} \cr} $$