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MMS Probability

Matoaca Middle School Probability Vocabulary

TermDefinition
Counting Principle If one event can occur in m ways and another event can occur in n ways, then the two events can occur in mn ways.
Pascal's Triangle A triangular pattern of numbers in which each row begins and ends with the number "1", and each number in the middle of a row is equal to the sum of the two numbers immediately above it.
tree diagram (for probability) A diagram that shows all of the possible outcomes for an event. Also called a Counting Tree. Counting trees are most useful when all events are equally likely.
probability how likely it is for an event to happen
how to find the probability P(outcome we are interested in) = # of equally likely favorable outcomes/ total # of equally likely outcomes"
outcomes different possible results
favorable outcomes results for a particular event to occur
experimental probability actual results for a total number of outcomes
theoretical probability If all results were equally likely to happen, the calculated (predicted) results
compound event the result of combining two or more events. The probability of a compound event is related to the probabilities of the compound events that make it up.
independent events Two events are independent if the occurrence of one of the events gives us no information about whether or not the other event will occur; that is, the events have no influence on each other.
probability of independent events occurring the probability that they both occur is equal to the product of the probabilities of the two individual events
dependent event An event whose outcome is influenced by the outcome of a prior event.
simulation "an experiment that models a real-life situation. Creating a Simulation is a strategy for finding the probability of an event by experimentation.
Created by: DDavis
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