All human blood can be \"ABO-typed\" as one of O, A, B, or AB, but the distribut

Question

All human blood can be "ABO-typed" as one of O, A, B, or AB, but the distribution of the types varies a bit among groups of people. Here is the distribution of blood types for a randomly chosen person in a country: Blood type A B AB O National probability 0.34 0.13 0.05 ? (a) What is the national probability of type O blood? Incorrect: Your answer is incorrect. (b) 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 person from this country can donate blood to Maria?

Explanation / Answer

a) here as sum of probability =1

hence probability of type O blood =1-0.34-0.13-0.05 =0.48

b)probability that a randomly chosen person from this country can donate blood to Maria =P(0)+P(B)=0.48+0.13

=0.61

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