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Mathematics · Grades 3–4

Probability

noun

The likelihood that a particular event will occur, expressed as a fraction or percentage.

Example Sentences

"The probability of flipping heads on a coin is 1/2 or 50%."

"We used probability to predict how often the spinner would land on red."

Synonyms & Related Terms

likelihoodchanceodds

Quick Check

Which best describes the meaning of probability?

Study Tips

To remember probability, try writing it in a sentence of your own. Connect it to something you already know about mathematics.

Use it in conversation today — saying a word aloud three times helps lock it into long-term memory.