If annual decrease in the population of a town is 5% and the present number of people is 40000 what will the population be in 2 years?  Choose the correct choice
A) 24560 B) 26450 C) 36100 D) 38920 E) 45200

Rationale: population in 2 years = 40000 ( 1 - 5 / 100 ) ^ 2 = 40000 * 19 * 19 / 20 * 20 = 36100 answer is c
Answer: C