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# 7 Math Ch. 9

### Probability

Term | Definition |
---|---|

combination | an arrangement, or listing, of objects in which order is not important |

complementary events | the events of one outcome happening and that outcome not happening / the sum of these events are 1 |

compound events | 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 |

experimental probability | an estimated probability based on the relative frequency of positive outcomes occurring during an experiment |

factorial | the expression n! is the product of all the counting numbers beginning with n and counting backward to 1 |

fair game | a game in which players of equal skill have an equal chance of winning |

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 |

outcome | one possible result of a probability event |

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 that occur when 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 |