Human blood may contain either or both of two antigens, a and b. blood that contains only 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. at a certain blood bank, 35% of the blood donors have type a blood, 10% have type b, and 5% have type ab.
round the answers to two decimal places
(a) what is the probability that a randomly chosen blood donor is type o?
(b) 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 chosen blood donor may donate to a recipient with type a blood?
(c) if someone has the a antigen, what is the probability that they are type ab?