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# C2_Chapter 9

### Chapter 9 Vocabulary

Combination An arrangement, or listing, of objects in which order is not important.
Complementary Event The events of one outcome happening and that outcome not happening are complementary events. The sum of the probabilities of complementary events is 1.
Compound Event An event consisting of two or more simple events
Dependent Events Two or more events in which the outcome of one event affects the outcome of the other event(s).
Disjoint Events Events that cannot happen at the same time.
Experimental Probability An estimated probability based on the relative frequency of positive outcomes occurring during an experiment.
Fundamental Counting Principle Uses multiplication of the number of ways each event in an experiment can occur to find the number of possible outcomes in a sample space.
Independent Events Two or more events in which the outcome of one event does not affect the outcome of the other event(s).
Outcome One possible result of a probability event. For example, 4 is an outcome when a number cube is rolled.
Permutation An arrangement, or listing, of objects in which order is important.
Probability The chance that some event will happen. It is the ratio of the number of ways a certain event can occur to the number of possible outcomes.
Random Outcomes occur at random if each outcome is equally likely to occur.
Sample Space The set of all possible outcomes of a probability experiment.
Simple Event One outcome or a collection of outcomes.
Theoretical Probability The ratio of the number of ways an event can occur to the number of possible outcomes.
Tree Diagram A diagram used to show the total number of possible outcomes in a probability experiment.
Created by: Mrs_Irish