1. 8-5: Adding Probabilities English Casbarro Unit 8

2. Vocabulary  Simple event- an event that can not be broken down into smaller units (rolling a 2)  Compound Event- an event made up of several simple events (rolling an odd number or a number greater than 5)  Mutually Exclusive Events- events that cannot occur at the same time (rolling a 2 or a 5)

9. Inclusive Events  If it is possible for both situations to occur at the same time, the events are called inclusive. For example, it is possible to draw a king or a spade, but it’s also possible that the king IS the spade.

13. Conditional Probability  This exists where there are dependent events.  Notation: P(B|A)  In words: the probability of B, given that A has happened.

16. By cross-multiplying, you can see that P(B|A) · P(A) = P(A and B)