The American Red Cross says that about 44% of the US population has Type O blood, 42% Type A, 10% Type B, and the rest Type AB. Someone volunteers to give blood. What is the probability that this donor a. Has Type AB blood?

b. Has Type A or Type B blood (this does not include AB)?

c. Is not Type A?

Now consider four potential blood donors, what is the probability that

d. All are Type O?

e. No one is Type AB?

f. They are not all Type A?

g. At least one person is Type B?