Two antigens, antigen A and antigen B, determine the four major human blood groups: A, B, AB, and O. The table below shows the percentage distribution of blood groups for the Caucasian population in the United States (American Red Cross, 2016) ABAB Blood group AntigenA B BNone Distribution 40\% 11% 445% Calculate the probability of randomly picking a blood sample that contains only one antigen, that is, a blood sample that belongs to either blood group A or blood group B. Probability = (Enter an integer)