A constituency is divided in four regions A, B, C and D. Two candidates X & Y contested the last election from that constituency. The adjoining graph gives the break up of voting in the four regions. Study the graph and answer the following questions.
Approximately how much percent of voters did not caste their votes?
As per the data released by the IncomeTax Department in December 2017, how much percent of total population paid income tax in the assessment year 201516?