Question

what is sex ratio how is it calculated​

Answer 1

$\huge\red{\sf Nmste}$

The sex ratio is the ratio of males to females in the population (normalized to 100).

We calculate two sex-ratios:- At birth, and in the total population. The sex ratio at birth is fairly standard, around 105. Due to higher mortality among males, the sex ratio in the total population switches to 95-97.