The total population of City A in 2019 is 3000. The population of city A in 2019 is 20% less than the previous year

The total population of City A in 2019 is 3000. The population of city A in 2019 is 20% less than the previous year and the population in 2018 is 20% more than the previous year. Find the total population of City A in 2017.

a)            3200

b)            3350

c)            3000

d)            3125

e)            None of these

Sol:

Total population of City A in 2017 = 3000 *

100/80 * 100/120 =3125