The population of a town increases 4% annually but is decreased by migration annually to the extent of % 2 1 . What will be the increase percent in three years ?
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Given : The population of a town increases 4% annually
but is decreased by migration annually to the extent of % 2
To Find : What will be the increase percent in three years
Solution:
The population of a town increases 4% annually
but is decreased by migration annually to the extent of % 2 1 .
Hence net increase per year = 4 - 2 = 2 %
Let say initial population = p
Hence population after 3 years = p (1 + 2/100)³
= P (1.061208)
= P + 0.061208P
Hence increase in population is 6.1208 %
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