-
A biologist studied the population of rats in a barn. He found that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is:
-
- 15
- 05
- zero
- 10
Correct Option: C
Net increase in population:
(Natality + Immigration) – (Mortality + Emigration)
(250 + 20) – (240 + 30) = 270 – 270 = 0
