Although the rules of probability are just basic facts about percents or proportions, we need to be able to use the language of events and their probabilities. Choose an American adult at random. Define two events: A = the person chosen is obese B = the person chosen is overweight, but not obese According to the National Center for Health Statistics, P(A) = 0.34 and P(B) = 0.33.
Explain why events A and B are disjoint.
A. Because some people are not obese nor overweight.
B. Because an obese person is certainly overweight.
C. Because event B rules out obese subjects.
D. Because some people may be considered obese and overweight.