How many people die cause of the Indian cobra?

All cobra are venomous. Death would depend on the quantity of venom injected and the health of the recipient. But certainly many people are killed by snakes in the tropics each year.

If medical aid and anti venom is provided within minutes of snake bite, chances of saving the victim are pretty high. If it is a king cobra that bit, the venom is very potent and can kill the victim within 5 mins.