ional Probability Let event A = The person has a sister. Let event B = The person has a brother. HAS A HAS A Sara BROTHER SISTER Tuan Adam Chu Davis Sajut Bucci Evan Kari Lyle What does P(BIA) = 0.50 mean in terms of the Venn diagram? A. Of the 4 people who have a brother, 2 of these also have a sister. . B. Of the 4 people who have a sister, 2 of these also have a brother. C. Of the 10 people surveyed, 5 of these have only a brother or only a sister. O D. Of the 10 people surveyed, 5 of these have a brother