Question

A biologist studied the population of rats in a barn. He found that the average natality was 300, average mortality 250, immigration 50 and emigration 100. The net increase in population is ____________.

विकल्प

• 10

• 15

• 05

• Zero

Answer 1

A biologist studied the population of rats in a barn. He found that the average natality was 300, average mortality 250, immigration 50 and emigration 100. The net increase in population is Zero.

Explanation:

Natality = 300, Immigration = 50

Mortality = 250, Emigration = 100

Net Increase in Population = [(Natality + Immigration) − (Mortality+ Emigration)]

= [(300 + 50) − (250 + 100)]

= 0