Calculation practice: Addition rule. When women are asked to rate Brussels sprouts, 30% say sprouts are “very repulsive,” 20% say that they are “somewhat repulsive,” 43% are “indifferent,” 6% say sprouts are “somewhat delicious,” and 1% claim they are “especially delicious.” Only one answer per woman was allowed. The data are from Trinkaus and Dennis (1991).

a. Are these five possible answers mutually exclusive? Explain.

b. What is the probability that a woman would say that Brussels sprouts are either very repulsive or somewhat repulsive?

c. What is the probability that a woman would say that Brussels sprouts are anything other than especially delicious?