Question: Blood types All human blood can be typed as one of O, A, B, or AB, but the distribution of the types varies a bit with race. Here is the distribution of the blood type of a randomly chosen black American:
Blood type: O A B AB
Probability: 0.49 0.27 0.20 ?
(a) What is the probability of type AB blood? Why?
(b) What is the probability that the person chosen does not have type AB blood?
(c) Maria has type B blood. She can safely receive blood transfusions from people with blood types O and B. What is the probability that a randomly chosen black American can donate blood to Maria?