Answer:
a) Option b
b) 7524
Explanation:
a) The survey is to estimate the number of adults. Hence only adults should be surveyed and not senior citizens or houseowners. Since all adults cannot be surveyed a sample strictly at random of adults can be surveyed. Since option b satisfies this, we select b as answer.
b) Given that in the survey of 25 adults 11 voted in the last election.
Hence out of 17100 adults, no of adults who voted in the last election would be
So out of 17100, 7524 adults would have voted in the last election.