A national survey for safety identified 20% hazard comes from company a, 20% from b, and 50% from company
c. what is the probability that the a caller will contact a person from company a or company c?
The probability that he will call A is 1 out of 2 because A and B have the same percent of Hazard. The probability that he will call C is 0/3 because it is more hazardous than the rest.
