If a population consists of 10 000 000 people and a census is taken how many people are sampled?

In a census, the goal is to count every individual in the population, so ideally, all 10,000,000 people would be sampled. However, in practice, there may be challenges such as non-response or inaccuracies, but the intention is to include the entire population in the census. Therefore, the sampled number is ideally 10,000,000.