Simple Probability & Likelihood

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What is probability?

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Probability is a measure of how likely an event is to occur, expressed as a number between 0 (impossible) and 1 (certain).

Tags

CCSS.7.SP.C.5

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What is a sample space?

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A sample space is the set of all possible outcomes of a probability experiment.

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What does 'likely' mean in probability?

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'Likely' means that an event has a high chance of occurring, typically more than 50%.

Tags

CCSS.7.SP.C.5

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What does 'unlikely' mean in probability?

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'Unlikely' means that an event has a low chance of occurring, typically less than 50%.

Tags

CCSS.7.SP.C.5

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What is the probability of rolling a 3 on a fair six-sided die?

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1/6

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CCSS.7.SP.C.7A

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If a jar contains 10 red and 5 blue marbles, what is the probability of picking a red marble?

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2/3

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CCSS.7.SP.C.7B

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What is the probability of flipping heads on a fair coin?

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1/2

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CCSS.7.SP.C.7A

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If there are 4 blue marbles and 23 red marbles in a jar, what is the likelihood of picking a red marble?

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Likely

Tags

CCSS.7.SP.C.5

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What is the probability of choosing an even number from 1 to 10?

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5/10 or 1/2

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CCSS.7.SP.C.7B

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How many outcomes are there when rolling a single die?

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6