Information and IdeasVery hardSupporting a per-capita claim
Information and Ideas practice question
Two towns' libraries last year:
Town A: 90,000 loans, population 30,000
Town B: 100,000 loans, population 50,000
A librarian claims that Town A's residents borrow more books per person than Town B's. Which choice most effectively uses data from the table to support the claim?
- A. Town A had 3 loans per resident (90,000 ÷ 30,000), compared with 2 per resident in Town B (100,000 ÷ 50,000).Correct
- B. Town B had more loans than Town A.
- C. Town A has a smaller population than Town B.
- D. Town A had 90,000 loans.
Answer: A. Town A had 3 loans per resident (90,000 ÷ 30,000), compared with 2 per resident in Town B (100,000 ÷ 50,000).
Per person requires dividing by population; choice A does so for both.
Why the other answers are wrong
- B. Town B had more loans than Town A.
- Totals point the other way and ignore population.
- C. Town A has a smaller population than Town B.
- Population alone, no loans.
- D. Town A had 90,000 loans.
- One figure, no rate.
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