Theoretical Probability Key words: knowing equally likely outcomes.

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Presentation transcript:

Theoretical Probability Key words: knowing equally likely outcomes

Fill in the blank! ____________ probability is based on knowing all the equally likely outcomes of an experiment. THEORETICAL probability is when you figure out all of the possible outcomes.

Matching The type of probability that is is based on knowing all the equally likely outcomes of an experiment. A.Experimental B.Theoretical

Vocabulary We have learned how to find OUTCOMES using a Tree Diagram and the Counting Principle. Today we are going to look at finding the probability of specific EVENTS.

Probabilities are written as fractions Number of favorable outcomes Number of possible outcomes What is the probability of getting a one if you role a fair dice?

ODDS IN FAVOR What are the chances of something happening What are the odds in favor of stopping on a number less than 5?

ODDS IN FAVOR What are the odds in favor of stopping on a multiple of 2?

ODDS IN FAVOR What are the odds in favor of stopping on a multiple of 3?

ODDS AGAINST What are the chances of something NOT happening? What are the odds against stopping on a number less than 5?

ODDS AGAINST What are the odds against of stopping on a multiple of 2?

ODDS AGAINST What are the odds against of stopping on a multiple of 3?

S P R S P R S P R S P R SS SP SR PS PP PR RS RP RR Z OUTCOMES How many outcomes are possible? 9 How many outcomes have Rock as a possibility? 5 What is the probability of one or more player selecting a Rock? 5/9

S P R S P R S P R S P R SS SP SR PS PP PR RS RP RR OUTCOMES

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