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Published byCarmel Hampton Modified over 4 years ago

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PLEASE PASS OUT YOUR ADVISORY FOLDERS! PROBABILITY What do you think the chances are…?

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Probability…what is it? Probability is the chance of an event occurring. Its value ranges from 0 to 1. 0 means – not going to happen 1 means – always will happen We find probability by measuring what we want to happen and putting it over the total outcomes that can happen

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Example A number cube, which is how dice is referred to as on the PSSA, is rolled. What is the probability we roll an odd number? How many odd numbers are on a number cube? How many total numbers (outcomes) are on a number cube? P(odd) = We can reduce this fraction P(odd) =

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You try one A bag of marbles contains 8 red, 5 blue, 1 black, and 2 green marbles. What is the probability of selecting a green marble? A) B) C) D)

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What if two or more things need to happen? Find the probability of each individual event. If they need to happen together, find the product of the events. Formula: P(event #1) P(event #2) = P(both events)

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Example Find the probability of flipping a coin and getting heads while rolling a number greater than 4 on a number cube. P(heads) = P(greater than 4) = P(heads and greater than 4) =

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You try one Find the probability of spinning a red on the spinner and rolling an even number? A) B) C) D)

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