A survey of top executives revealed that 35 percent of them regularly read Time magazine, 20 percent read Newsweek, and 40 percent read U.S. News and World Report. Ten percent read both Time and U.S....

A survey of top executives revealed that 35 percent of them regularly read Time magazine, 20 percent read Newsweek, and 40 percent read U.S. News and World Report. Ten percent read both Time and U.S. News and World Report.

a. What is the probability that a particular top executive reads either Time or U.S. News and World Report regularly?

b. What is the probability .10 called?

c. Are the events mutually exclusive? Explain.