U.S. Population The data show the U.S. population by age.
Under 20 years is 27.0%.
20 years and over is 7.30.
65 years and over is 13.1.
Choose one person from the United States at random.
Find the probability that the person is
a. From 20 years to 64 years
b. Under 20 or 65 and over
c. Not 65 and over
a. To find the probability that the person is from 20 years to 64 years, we need to subtract the percentages of people under 20 years and 65 years and over from 100%:
Probability = 100% - 27.0% - 13.1% = 59.9%
b. To find the probability that the person is either under 20 or 65 and over, we can add the percentages of people under 20 years and 65 years and over:
Probability = 27.0% + 13.1% = 40.1%
c. To find the probability that the person is not 65 and over, we subtract the percentage of people 65 years and over from 100%:
Probability = 100% - 13.1% = 86.9%