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Birth rate (natality) calculation
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If there are 250 snails in a pond, and within a year their number increases to 2500 by reproduction. What should be their birth rate per snail per year?A 10B 9C 25D 15Increase in population $=2500-250=2250$. Birth rate per capita $=\dfrac{2250}{250}=9$ per snail per year.
