What is the High School Probability Quiz?
The High School Probability Quiz is a free 4-choice web app for practicing probability topics connected with high school Math A.
Students can review counting and probability in short rounds, so it works for quick daily practice, test preparation, and later review in Grades 10 to 12.
All questions, answer choices, explanations, hints, diagrams, and numerical settings are original. The app does not reproduce textbook, workbook, entrance exam, mock exam, or official test questions.
Practice from counting to conditional probability
The courses begin with total cases and favorable cases, then move into tree diagrams, addition and multiplication rules, permutations, combinations, repeated trials, complements, conditional probability, independence, expected value, tables, and Venn diagrams.
The app focuses on the habits that make probability easier: decide the sample space, choose whether order matters, separate numerator and denominator, and check whether a complement or condition changes the denominator.
Course lineup
- 10-question probability basics
- 20-question counting and tree diagrams
- 20-question permutations and combinations
- 20-question repeated trials
- 20-question conditional probability
- 20-question complements and at-least-one problems
- 20-question independence and expected value
- 30-question Venn diagrams and tables
- 50-question standard mixed practice
- 100-question comprehensive probability mix
Dynamic hints with original diagrams
Hints change depending on the current question. They include original SVG-style diagrams such as sample-space boxes, tree diagrams, Venn diagrams, repeated-trial diagrams, conditional-probability diagrams, and expected-value tables.
Each hint is designed to show what to count first, where the denominator comes from, and why a common wrong choice is tempting.
My Page stores challenge history, best records, and often missed questions for repeated review.
How to use this app for study
Start with the 10-question basics course when you want to warm up, then choose a topic course for the unit you are studying in class. When you can solve the topic courses smoothly, try the 50-question and 100-question mixed courses to practice choosing the method yourself.
Teachers and guardians can also use the short 4-choice format for review time, homework warm-ups, or checking which probability topics need more practice.
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