A census collects data on: MCQ with Answer and Explanation

Explanation:
Geometric mean = (4 × 9 × 16)^(1/3) = (576)^(1/3) = 8. It is the nth root of the product of n observations, useful for averaging ratios or growth rates.

Explanation:
β denotes absence of B, so (Aβ) = possessing A and not B.

Explanation:
Dependency ratio = (Young dependents + Old dependents) / Working-age population × 100, indicating the economic burden on the productive population to support non-working groups.