The population of a city increases by 6% per year but due to migration it decrease by 1% per years. What will be the percentage increase in population in 3 years?	Choose the correct answer:
A) 9 %  B) 9.27 %  C) 27 %  D) 15.76 %  E) none of these

Rationale: actual increase in population = 5 % let , earlier population = 100 then the population after 3 years = 100 ( 1 + 5 / 100 ) ^ 3 = 115.7625 ∴ required percentage = 15.7625 % answer : d
Answer: D