Probability & Statistics
Probability questions dominate quant interviews. You'll work through Bayes' theorem, expected value, distributions, Markov chains, and the classic puzzles (Monty Hall, Birthday Problem) that interviewers love.
41 lessons
68 min
Lessons
1. Intro
2. Basic Probability Rules
Foundations you must know cold
3m
3. Conditional Probability
When events depend on each other
4m
4. Bayes' Theorem
Updating beliefs with evidence
4m
5. Expected Value
The average outcome
4m
6. Quiz: Bayes' Theorem
Test your understanding
2m1 problems
7. Variance and Standard Deviation
Measuring spread
4m
8. The Monty Hall Problem
A classic interview puzzle
3m
9. The Birthday Problem
When intuition fails
3m
10. Dice and Coin Problems
The bread and butter of interviews
3m
11. Quiz: Expected Value
Test your understanding
2m1 problems
12. Common Distributions
Normal, Binomial, Poisson
4m
13. Central Limit Theorem
Why the normal distribution matters
4m
14. Markov Chains
State-based probability
4m
15. Hypothesis Testing
Making decisions with data
4m
16. Quiz: Distributions
Test your understanding
2m1 problems
17. Linear Regression Basics
The most used model in quant finance
4m
18. Correlation and Covariance
Measuring relationships
4m
19. Overfitting and Cross-Validation
The researcher's trap
4m
20. Permutations and Combinations
21. Quiz: Random Walks
Test your understanding
2m1 problems
22. Counting Principles
23. Random Variables
24. Cumulative Distribution Functions
25. Poisson Distribution
26. Quiz: Conditional Probability
Test your understanding
2m1 problems
27. Exponential Distribution
28. Normal Distribution Deep Dive
29. Covariance Properties
30. Conditional Expectation
31. Quiz: Central Limit Theorem
Test your understanding
2m1 problems