OpenStax, Algebra and Trigonometry 2e §13.7 Probability · Exercise 58 · Probability · Counting & chance
Probability · Exercise 58
Use this data for the exercises that follow: In 2013, there were roughly 317 million citizens in the United States, and about 40 million were elderly (aged 65 and over).
If you meet a U.S. citizen, what is the percent chance that the person is elderly? (Round to the nearest tenth of a percent.)
Its source prints no answer for this problem, so there's nothing to check against.
OpenStax, Algebra and Trigonometry 2e · §13.7 Probability · Exercise 58
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