In a population of 1,000 elephants, how many individuals would survive for 50% of the species' maximum life span?

Many elephants are killed when they are still young. pochers hunt elephants due to is valuable ivory that is found in their tusk. according to the report, the death rate of elephants due to hunting is 20 %, so the number of elephants will survive is 1000 (1 - 0.20) = 800 elephants