In one year, the population, of a village increased by 10% and in the next year, it decreased by 10%. If at the end of 2nd year, the population was 7920, what was it in the beginning?  Choose the correct choice from the following choices
A) 8008  B) 8000  C) 8022  D) 8021  E) 8022

Rationale: "x * 110 / 100 * 90 / 100 = 7920 x * 0.99 = 7920 x = 7920 / 0.99 = > 8000 answer : b"
Answer: B