Question: Blood Types and Rh Factor. In addition to being grouped into four blood types, human blood is grouped by its Rhesus (Rh) factor. Consider the figures below which show the distributions of these groups for Americans.

O A B AB

Rh+ 37% 34% 10% 4%

Rh- 6% 6% 2% 1%

Choose 1 American at random. Find the probability that the person

a. Is a universal donor, i.e., has O negative blood

b. Has type O blood given that the person is Rh+

c. Has A+ or AB- blood

d. Has Rh- given that the person has type B