Section13.1 Notes

# Section13.1 Notes - Algebra 1 Survey Friedrich/Higgins...

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Algebra 1 Survey Name Date Friedrich/Higgins Notes 13.1 Day 1 Objective: Find the likelihood of an event. Use tree diagrams to answer questions of probability. Every day we hear probabilities: the weather tells the chance it might rain, the likelihood of winning the lottery, the possibility of having a boy vs. a girl. All these words describe a possible event. This is called an __________________________. An event is a collection of outcomes . The set of all possible outcomes is called a ____________________. Let’s find sample spaces : Coin: _________, ___________ Die: _________, __________, __________, __________, __________, ____________, Deck of Cards: _________________________________________________________________________ The probability of an event is a measure of the likelihood or the chance the event will occur. Probability is a number between 0 and 1and can be written as a fraction, decimal or percent. Probability = 0 means impossible, Probability = 1 means certain, Probability = 0.5 (1/2) means equally likely. The probability of an event is written as P(E) = _______. Theoretical Probability = Experimental Probability = You actually do the experiment and record data.

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