Riddle

How is world population measured?

Choose an answer

A.By counting every person
B.Satellite imagery
C.Phone registrations
D.Census/Sampling
Hint: It's a 2-word phrase with 14 letters, starting with "C".

Answer

Census/Sampling

Why this is the answer

It is a combination of national censuses (counting) and statistical sampling/modeling for areas with less reliable data.

This riddle is filed under Math Riddles and rated Medium.

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