Question

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?

Answer 1

Answer: Probability of Type AB = 1 - 0.49 - 0.27 - 0.20 = 0.04 (sum of probabilities is 1)

Probability not type AB = 1 - 0.04 = 0.96

Probability Type B or Type O = 0.49 + 0.20 = 0.69

Explanation: