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Chance Experiments

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Review! MondayTuesdayWednesdayThursdayFriday ChocolateBlueberryPoppy SeedCranberryChocolate SpiceChocolate Chip BananaBlueberryPoppy Seed PumpkinChocolateCranberrySpiceBlueberry Poppy SeedBananaChocolate Chip CranberryPumpkin BlueberrySpicePoppy SeedBananaCranberry Patty has a muffin for breakfast everyday before school. The table below lists the different flavors she had for the entire month of March. What percentage of the muffins Patty ate were chocolate? Total number of muffins = 25 Number of chocolate muffins = 3

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Vocabulary Chance experiment - situation whose ultimate outcome is uncertain. Sample Space- all possible outcomes Outcome- each possibility Example: You flip a coin and it lands on heads Chance Experiment : Flipping a coin Sample Space : heads, tails Outcome : heads Probability – the measure of how likely it is that an event will happen as the result of the chance experiment

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Determine the experiment, sample space, and outcomes for the following situations. Drawing a cube from a bag Raffle drawing Green cube Red, blue, yellow, green Names of people in the raffle (30 names) Your name

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Calculating Probability

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Probability Scale A probability of 0, or 0%, means the event has no chance of happening. A probability of 1/2, or 50%, means the event is just as likely to happen as not to happen. A probability of 1, or 100%, means the event is certain to happen. Can you think of some examples of these different probabilities happening?

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Impossible Unlikely Likely to Occur Half of the Time Likely Certain

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Data Collection Activity For this activity you will need: – The student that sits next to you – A Data Collection Worksheet – 1 spinner per pair You need to complete questions 1-8 with your partner (you have about 15 minutes to do this). Instructions for the activity are on the worksheet but please ask if you have questions. While collecting data please be thinking about: – Where you would put the probability of winning the game on the Probability Scale… Impossible Unlikely Likely to Occur Half of the Time Likely Certain

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Probability

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How to Find the Probability of an Event Probability Probability- how we measure the likelihood of an outcome of a chance event P(event) = number of favorable outcomes total number of possible outcomes What is the probability of a coin landing on heads if you toss it in the air?

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You roll a six-sided die whose sides are numbered from 1 through 6. Find the probability of rolling a 1. P (rolling a 1) = number of ways to roll a 1 number of ways to roll the die 1 6 = Find the probability of rolling an odd number. Three outcomes correspond to rolling an odd number: rolling a 1, 3, or a 5. P (rolling odd number) = number of ways to roll an odd number number of ways to roll the die 3 6 1 2 =

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Find the probability of randomly choosing a blue marble from the marbles shown at the right. P (blue) = 3 10 There are 3 blue marbles. There are 10 marbles in all. The probability of choosing a blue marble is, 0.3, or 30%. 3 10 ANSWER

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Back to the Data Collection Activity Spinning the spinner 1, 2, 3, 4

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