OpenStax, Algebra and Trigonometry 2e §13.7 Probability · Exercise 61 · Probability · Counting & chance
Probability · Exercise 61
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 four are elderly? (Round to the nearest thousandth of a percent.)
OpenStax, Algebra and Trigonometry 2e · §13.7 Probability · Exercise 61
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