Q. Consider the following statements:

1. Population density is calculated as the number of persons per unit area.
2. Only Bangladesh and China have higher average population densities than India.
3. The population density of India in the year 2011 was 482 persons per sq km.

Which of the above statements is/are incorrect?
Answer: Only 2 and 3
Notes: Population density is indeed calculated as persons per unit area. However, besides Bangladesh, it is Japan—not China—that has a higher average population density than India. Furthermore, in 2011, India's population density was 382 persons per sq km, not 482. Therefore, statements 2 and 3 are incorrect.