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KVPY Sample Paper KVPY Stream-SX Model Paper-2

  • question_answer
    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

    A) 10                                

    B) 15

    C) 5                                 

    D) 0

    Correct Answer: D

    Solution :

    [d] The net increase in population will be Birth rate [b] + Immigration (I) \[-\] Death rate [d] + Emigration [e], i.e. \[250-20-(240+30)=0\]


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