All tracks

The core of every trading interview · ~3 weeks

Probability Mastery

From conditioning reflexes to the hard classics, broken sticks, branching processes, optimal stopping. Finish this and probability rounds become home turf.

20 steps
  1. 1

    All Different

    Easy

    →
  2. 2

    Strictly Increasing Rolls

    Medium · Private

    →
  3. 3

    The Birthday Paradox

    Medium · Private

    →
  4. 4

    The Suspicious Coin

    Medium · Private

    →
  5. 5

    Expected Maximum

    Medium · Private

    →
  6. 6

    Collect All Six Faces

    Medium · Private

    →
  7. 7

    First HH

    Medium · Private

    →
  8. 8

    One Reroll Allowed

    Medium · Private

    →
  9. 9

    Two Rerolls Allowed

    Medium · Private

    →
  10. 10

    Gambler's Ruin

    Medium · Private

    →
  11. 11

    The Lost Boarding Pass

    Medium · Private

    →
  12. 12

    The Hat Check Problem

    Medium · Private

    →
  13. 13

    Full House

    Medium · Private

    →
  14. 14

    Amoeba Extinction

    Hard · Private

    →
  15. 15

    The Broken Stick

    Hard · Private

    →
  16. 16

    Points on a Semicircle

    Hard · Private

    →
  17. 17

    Three Draws, Stop When You Like

    Hard · Private

    →
  18. 18

    Draws Until the Sum Exceeds 1

    Hard · Private

    →
  19. 19

    Solve 30 probability questions total

    0/30

    →
  20. 20

    Solve 20 expected-value questions total

    0/20

    →