Permutation, Combination & Probability

medium importance~1 Q in Tier 130 formulas⚡ 13 shortcuts6 subtopics

Overview Learn (6)Formulas (30)Examples (5)Practice (74)

Practice one subtopic at a time

Each subtopic has its own practice sets of 10, next to its notes and question types.

Counting Principles: Product & Sum Rules 12 Q Permutations: Arrangements 12 Q Combinations: Selections 12 Q Distribution & Grouping 13 Q Probability: Core Rules 13 Q Dice, Cards & Coins 12 Q

Full topic test — all 74 questions

Two modes: Practice reveals the explanation after each question; Test uses a per-question time budget like the real exam and saves your score.

Topic test · 74 questions

Suggested time 51 min · wrong answers go to your mistake notebook automatically.