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)?

A

4 : 7

B

9 : 7

C

5 : 7

D

7 : 4