The population f a tow

Question

The population f a town increases by 5% annually . If its population in 2001 was 1,38,915, what it was in 1998 ?

Options:

A . 1,00,000

B . 1,08,000

C . 1,10,000

D . 1,20,000

Answer: Option D

Population in 1998 = `(138915)/((1 + 5/100)^3)` = `(138915 xx 20/21 xx 20/21 xx 20/21)` = 1,20,000

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