OpenStax, Algebra and Trigonometry 2e §13.7 Probability · Exercise 60 · Probability · Counting & chance
Probability · Exercise 60
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 five U.S. citizens, what is the percent chance that three are 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 60
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