If population of certain city increases at the rate of 5%. If population in 1981 was 231525, then population in 1978 was?  Choose the correct answer: A) 120000 B) 120029 C) 187899 D) 178968 E) 200000
X * (105/100) * (105/100) * (105/100) = 231525   X = 231525/1.157625= 
<gadget id="calculator">231525/1.157625</gadget>
<output>200_000</output>
200000   Answer:200000
<result>E</result>
If population of certain city increases at the rate of 5%. If population in 1981 was 231525, then population in 1978 was?