1. If the knowledge that an event A has occurred implies that a second event B cannot occur, then the events A and B are said to be A. mutually exclusive. B. collectively exhaustive. C. independent. D. the sample space.
2. (b) If event A and event B are as above and event A has probability 0.3 and event B has probability 0.4, then the probability that A or B occurs is___

For a particular large group of people, blood types are distributed as shown below. (Note that each person is classified as having exactly one of these blood types.)

Blood Type	O	A	B	AB
Probability	0.13	0.33	0.03	?

3. If two people are selected at random, what is the probability that both people selected will have type O blood? A. 0.13 B. 0.0169 C. 0.26 D. None of the above.

4.) 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 selected person will be able to donate blood to Maria? A. 0.16 B. 0.36 C. 0.03 D. None of the above.

5. The probability that a randomly selected person will have type AB blood is A. 0.13 B. 0.51 C. 0.03 D. None of the above.