Simple Probability

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What is probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1, or as a percentage.

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CCSS.7.SP.C.5

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What is the formula for calculating probability?

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

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CCSS.7.SP.C.7A

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What is an even number?

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An even number is an integer that is exactly divisible by 2.

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CCSS.2.OA.C.3

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How do you calculate the probability of spinning an even number on a spinner with numbers 1 to 8?

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There are 4 even numbers (2, 4, 6, 8) out of 8 total numbers, so the probability is 4/8 or 50%.

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CCSS.7.SP.C.7B

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What is the probability of choosing a letter other than 'A' from the word 'ALGEBRA'?

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There are 5 letters other than 'A' (L, G, E, B, R) out of 7 total letters, so the probability is 5/7.

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CCSS.7.SP.C.7B

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What is the probability of spinning a spinner and landing on blue if there are 3 blue sections out of 8 total sections?

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The probability is 3/8.

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CCSS.7.SP.C.7B

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How do you calculate the probability of selecting a brown candy from a bowl containing different colored M&Ms?

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Count the number of brown candies and divide by the total number of candies. For example, if there are 2 brown candies out of 20 total, the probability is 2/20 or 1/10.

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CCSS.7.SP.C.7B

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What does it mean to simplify a fraction in probability?

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Simplifying a fraction means reducing it to its lowest terms, where the numerator and denominator have no common factors other than 1.

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What is the probability of spinning a spinner and landing on 'A' if there is 1 'A' out of 4 total sections?

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The probability is 1/4.

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CCSS.7.SP.C.7A

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What is the difference between theoretical probability and experimental probability?

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Theoretical probability is based on the expected outcomes in a perfect scenario, while experimental probability is based on actual results from experiments.