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11-2: Probability Warm-Up: Move your desks into groups. 1. Describe a situation in which the number of outcomes is given by 8 C 3. 2. How can we change the situation so it becomes 8 P 3 ?

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Experimental Probability 1) A softball player got a hit in 20 of her last 50 times at bat. What is the experimental probability that she will get a hit in her next at bat? The probability of an event is a number between 0 and 1 (or a percent between 0% and 100%), unless the event is impossible = 0 (or 0%) OR the event is certain = 1 (or 100%).

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Sample Space: the set of all possible outcomes to an experiment or activity. Equally likely outcomes: each outcome in a sample space has the same chance of occurring. 2) – What is the sample space for rolling a standard number cube? - Is this an example of equally like outcomes? RollYouGroupProbability 1 2 3 4 5 6

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Theoretical Probability Compare the experimental probability to your theoretical probability for rolling a number cube.

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Finding Geometric Probability 3) A batter’s strike zone depends on the height and stance of the batter. What is the geometric probability that a baseball thrown at random within the batter’s strike zone will be a high-inside strike (one of the hardest pitches to hit)?

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