The population of a town increases 10% and 20% respectively in two consecutive years. After the growth the present population of the town is 1320. Then what is the population of the town 2 years ago?
Choose the correct choice from the following answers:
A) 1100  B) 1001  C) 1010  D) 1000  E) 1002

Rationale: "explanation : formula : ( after = 100 denominator ago = 100 numerator ) 1320 * 100 / 110 * 100 / 120 = 1000 answer : option d"
Answer: D