The pie charts below represent the percentage distribution of total students selected in the SSC examination and the percentage distribution of total ...
Question
The pie charts below represent the percentage distribution of total students selected in the SSC examination and the percentage distribution of total boys selected from six different zones. The total number of students selected is $12000$, and the total number of boys selected is $7000$.

What is the difference between the total number of girls selected from zones B, D, and F combined and the total number of boys selected from zones B and D combined?