Question: Physical activity the table gives the percent of U.S. residents who participated in no leisure-time physical activity, categorized by race or origin (Source: Centers for Disease Control).
(a) What is the probability that a black person participated in no leisure-time physical activity?
(b) What is the probability that a white person participated in no leisure-time physical activity?
(c) Can we add the probabilities in the row to find the probability that a U.S. resident participated in no leisure-time physical activity? Why?