Beginner

Quant Interview Foundations

The twelve ideas behind most first-round quant questions.

1. 1Sample Spaces and Basic RulesLesson · Probability
2. 2Permutations and CombinationsLesson · Combinatorics
3. 3Conditional ProbabilityLesson · Probability
4. 4Expected Value: FundamentalsLesson · Expected Value
5. 5Complement RuleMethod
6. 6Bayes' TheoremLesson · Probability
7. 7Stars and BarsLesson · Combinatorics
8. 8Linearity of ExpectationLesson · Expected Value
9. 9Indicator VariablesLesson · Expected Value
10. 10Geometric ProbabilityLesson · Probability
11. 11Order StatisticsLesson · Probability
12. 12Recursive Expectation (First-Step Analysis)Lesson · Expected Value