Problem 9 (4 points)
A pharmaceutical company conducted a study to evaluate the effect of an allergy relief medicine; 250 patients
with symptoms that included itchy eyes and a skin rash received the new drug. The results of the study are as
follows: 90 of the patients treated experienced eye relief, 135 had their skin rash clear up, and 45 experienced
relief of both itchy eyes and the skin rash. What is the probability that a patient who takes the drug will
experience relief of at least one of the two symptoms?
Problem 15 (14 points)
During a recent period of high unemployment, hundreds of thousands of drivers dropped their automobile
insurance. Sample data representative of the national automobile insur- ance coverage for individuals 18 years
of age and older are shown here.
Develop a joint probability table for these data and use the table to answer the remaining
What do the marginal probabilities tell you about the age of the U.S. population