Question

An NGO (non-governmental organizatoin) works to Sur-
vey the population growth rate of the cities. The survey
found that in a city the annual growth rate was 10% in the
year 2005 and 2006 and 20% in the year 2007 and 2008,
but due to natural disaster 5% of the population was died
in the year 2009. if the population is 827640 in the last
2009. So, find the population in the first year 2005?
(a) 500
(b) 5000
(c) 50000
(d) None​

Answer 1

Answer:

5000 is a correct answer