If population of certain city increases at the rate of 5%. If population in 1981 was 138915, then population in 1978 was?  Select
A) 12,0000 B) 130000 C) 261000 D) 627000 E) 12690
Explanation:   X * (105/100) * (105/100) * (105/100) = 138915   X = 138915/1.157625= 
<gadget id="calculator">138915/1.157625</gadget>
<output>120_000</output>
120000   12,0000nswer: Option 12,0000
<result>A</result>
If population of certain city increases at the rate of 5%. If population in 1981 was 138915, then population in 1978 was?