Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

Exercise 69

Health Care: Flu Based on data from the statistical Abstract of the United States , 112th Edition, only about 14% of senior citizens (65 years old or older) get the flu each year. However, about 24% of the people under 65 years old get the flu each year. In the general population, there are 12.5% senior citizens (65 years old or older).
(a) What is the probability that a person selected at random from the general population is a senior citizen who will get the u this year
(b) What is the probability that a person selected at random from the general population is a person under age 65 who will get the u this year
(c) Answer parts (a) and (b) for a community that is 95% senior citizens.
(d) Answer parts (a) and (b) for a community that is 50% senior citizens.