A biologist studied the population of rats in a barn. He found that the average natiality was 250, average mortality 240

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Q 1288745607.     A biologist studied the population of rats in a barn. He found that the average natiality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is
A

10

B

15

C

5

D

Zero

HINT

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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