46. In a BusinessWeek/Harris Poll, 1035 adults were asked about their attitudes toward business (BusinessWeek, September 11, 2000). One question asked: “How would you rate large U.S. companies on making good products and competing in a global environment?”

The responses were: excellent—18%, pretty good—50%, only fair—26%, poor—5%, and don’t know/no answer—1%.

a. What is the probability that a respondent rated U.S. companies pretty good or excellent?

b. How many respondents rated U.S. companies poor?

c. How many respondents did not know or did not answer?