The given bargraph represents the number of students admitted in four schools (S1, S2, S3, S4) during two consecutive years 2017 and 2018.

The ratio between total number of students admitted in the four schools in 2017 to the total number of students admitted in the four schools in 2018 is:

11 : 12

Total number of students admitted in the four schools in 2017  : Total number of students admitted in the four schools in 2018

( 250 + 240 + 200+ 300 )  :  ( 320 + 360 + 150 + 250 )

                 990                 :               1080

                  11                  :                12