What is the difference between the number of female teachers in District F and the total number of teachers (both male and female) in District E?

$$\eqalign{ & \text{Total number of teachers in:} \cr & \text{A → } \frac{14}{100}\times4500 = 630\cr & \text{B → } \frac{16}{100}\times4500 = 720\cr & \text{C → } \frac{28}{100}\times4500 = 1260\cr & \text{D → } \frac{15}{100}\times4500 = 675\cr & \text{E → } \frac{21}{100}\times4500 = 945\cr & \text{F → } \frac{6}{100}\times4500 = 270\cr} $$

	A	B	C	D	E	F
Males	200	400	600	100	500	100
Females	430	320	660	575	445	170

Number of female teachers in F = 170
Total number of teachers in E
= 500 + 445
= 945
∴ Required difference
= 945 - 170
= 775