Blood types all human blood can be typed as one of o a b or


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?

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Basic Statistics: Blood types all human blood can be typed as one of o a b or
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