Consider the four blood types A,B,AB and O described in previous exercise together with the two antigens anti-A and anti-B. Suppose that, for a given person, the probability of type O blood is 0.5, the probability of type A blood is 0.34, and the probability of type B blood is 0.12.

a) Find the probability that each of the antigens will react with this person’s blood.

b) Find the probability that both antigens will react with this person’s blood.

http://www.bilkent.edu.tr/~math250/Solution%20set1.pdf