Calculate females from Bangalore and Delhi

For Bangalore, females are $\frac{7}{5+7} \times 1200 = \frac{7}{12} \times 1200 = 700$. For Delhi, females are $\frac{8}{11+8} \times 950 = \frac{8}{19} \times 950 = 400$. Total females = $700 + 400 = 1100$.

$\text{Total Females} = 700 + 400 = 1100$

Calculate males from Patna and Nagaland

For Patna, males are $\frac{4}{4+3} \times 700 = \frac{4}{7} \times 700 = 400$. For Nagaland, males are $\frac{5}{5+3} \times 800 = \frac{5}{8} \times 800 = 500$. Total males = $400 + 500 = 900$.

$\text{Total Males} = 400 + 500 = 900$

Calculate the difference

Subtract the total number of males from the total number of females calculated in previous steps: $1100 - 900 = 200$.

$1100 - 900 = 200$