The line chart given below shows the number of male teacher and female teachers in 5 schools.

J1 = Total number of male and female teachers in school P.

J2 = The difference between the total number of male and the total number of female teachers in all the 5 schools.

What is the value of (J1 : J2) ?

7 : 4

J1 = Total number of male and female teachers in school P.

Total number of male and female teachers in P  80 + 60 =  140

J2 = The difference between the total number of male and the total number of female teachers in all the 5 schools.

Total number of males = 60 + 80 + 70 + 50 + 30 = 290

Total number of females = 80 + 70 + 20 + 10 + 30 = 210

J2 = 290 - 210 = 80

Now , J1 : J2 = 140 : 80

                        7   :  4