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प्रश्न
A biologist studied the population of rats in a barn. The bound that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is ______.
विकल्प
15
05
zero
10
MCQ
रिक्त स्थान भरें
उत्तर
A biologist studied the population of rats in a barn. The bound that the average natality was 250, average mortality 240, immigration 20 and emigration 30. The net increase in population is zero.
Explanation:
Net increase in population (Natality + immigration) - (mortality + emigration)
= (250 + 20) - (240 + 30)
= 270 - 270
= 0
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