MH SET Exam 16 Apr 2017 Paper

A certain metropolitan area has a population of 9 million, of whom 5 million live in the city, and 4 million live in the. Each year only 20% of the suburbanites move to the city (and the rest stay where they are), while 40% of the city dwellers move to the suburbs. Ignoring the effect of births, deaths, and migration, what will be the population of the city after completing two years?