Basic Theoretical Probability

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What is theoretical probability?

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Theoretical probability is the likelihood of an event occurring based on all possible outcomes, calculated as the ratio of the number of favorable outcomes to the total number of possible outcomes.

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CCSS.7.SP.C.7A

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How do you calculate the probability of an event?

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Probability of an event = (Number of favorable outcomes) / (Total number of possible outcomes).

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CCSS.7.SP.C.7A

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What is the theoretical probability of spinning a number less than 3 on a spinner with numbers 1 to 8?

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CCSS.7.SP.C.7B

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What is the probability of an event that is impossible?

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0% (An impossible event cannot occur).

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CCSS.7.SP.C.5

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What is the probability of an event that is certain?

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100% (A certain event will definitely occur).

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CCSS.7.SP.C.5

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What is the likelihood of picking a red card from a standard deck of cards?

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Equally likely (There are 26 red cards out of 52 total cards).

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CCSS.7.SP.C.7A

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If a spinner has 8 equal sections, what is the probability of spinning a 7?

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CCSS.7.SP.C.7A

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What does it mean if an event is described as 'likely'?

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It means that the event has a greater chance of occurring than not occurring.

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CCSS.7.SP.C.5

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What does it mean if an event is described as 'unlikely'?

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It means that the event has a lesser chance of occurring than not occurring.

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CCSS.L.1.6

CCSS.L.3.6

CCSS.L.4.6

CCSS.RL.1.4

Front

What is the probability of rolling a number greater than 4 on a standard six-sided die?

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CCSS.7.SP.C.7B