From above given table ,
Total number of students in II = 100 + 200 + 200 + 100 + 100 + 100 + 100 = 900
Total number of students in I = 200 + 300 + 500 + 100 + 400 + 300 + 200 = 2000
∴ Required ratio = total number of students in II : total number of students in I
Required ratio = 900 : 2000 = 9 : 20
