4. Human blood may contain either or both of two antigens, A and B. Blood that contains the A antigen is called type A, blood that contains only the B antigen is called type B, blood that contains...

Extracted text: 4. Human blood may contain either or both of two antigens, A and B. Blood that contains the A antigen is called type A, blood that contains only the B antigen is called type B, blood that contains both antigens is called type AB, and blood that contains neither antigen is called type O. Out of 50 blood donors at a recent blood drive, 8 donors had type A blood, 11 had type B, 21 had type AB, and 10 donors had type O blood. What is the probability that a randomly chosen blood donor is type 0? A recipient with type A blood may safely receive blood from a donor whose blood does not contain the B antigen. What is the probability that a randomly selected blood donor may donate to a recipient with type A blood? (Hint: Consider all ways someone could have the B antigen) b)