Human blood may contain either or both of two antigens, A and B. Blood that cont

Question

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, 45 % of the blood donors have type A blood, 10 % have type B, and 5 % have type AB. 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 redpient with type B blood?

Explanation / Answer

A blood type donors = 45%

B blood type donors = 10%

AB blood type donors = 5%

O blood type donors = 40%

Probability of choosing blood donor who can donate to recipient with type B blood =

Both Type B and type O can donate to recipient with type B blood.

Hence the probability is = 0.4 + 0.1 = 0.5

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