📖 Math Dictionary

Probability

/prob-uh-BIL-ih-tee/

Definition

Probability measures how likely an event is to occur. It's calculated as the number of favorable outcomes divided by the total number of possible outcomes. Probability ranges from 0 (impossible) to 1 (certain).

💡Example

Rolling a 3 on a die: Probability = 1/6 ≈ 0.167 (one favorable outcome out of six possible). Flipping heads: Probability = 1/2 = 0.5 = 50%.

🎓Used in Grades

Grades 7-12KS3 to GCSEÅrskurs 7-9

📚Learn More

probability →compound probability →statistics →

Practice with Probability

Generate practice problems that use this concept.

Create Ready-to-Use Math Test (PDF)Ready in minutes. No editing needed.

Browse Dictionary

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Build the assessment, not just the questions

MathQuizily helps teachers move from a topic or standard to a printable math test with answer keys, balanced difficulty, and classroom-ready PDF output.

A useful assessment should make the learning target clear, cover the intended skills, and give the teacher enough information to review the result before students see it. The workflow supports short quizzes, chapter checks, diagnostic tests, homework packets, make-up assessments, and equivalent retake versions.

Choose a grade, topic, curriculum context, and difficulty level. The generated PDF includes a student version and a separate worked answer key, so teachers can print, review, and grade without reformatting questions or building solutions from scratch. No student account is required to create or print a test.