In an election between two candidates, 10% of the voters did not cast their votes and 5% of the votes polled were found invalid. The successful candidate got 52.5% of the valid votes and won by a majority of 1710 votes. The number of voters enrolled on the voters list was:
Answer the following question on the basis of the bar graph given.
The number of years in which there was an increase in the revenue from at least two categories is:
