The given bar graph represents the number of students who appeared in the board examinations in session 2017-18 and 2018-19. Study the graph and answer the question that follows.

What is the ratio of the total number of students appeared in examinations in 2017-18 and 2018-19?

5 : 6

Total number of students appeared in examinations in 2017-18  :  Total number of students appeared in examinations in 2018-19

 ( 25 + 40 + 53 + 32 )   :   ( 30 + 48 + 64 + 38 )

               150               :               180

                 5                 :                 6