Jane Street · Probability

Jane Street Probability Interview Questions

Probability is the backbone of every quant interview: conditional probability, Bayes’ theorem, expected value and classic puzzles like Monty Hall and the two-children problem. Jane Street is a proprietary trading firm known for ETF and options market-making and a famously probability- and mental-math-heavy interview process. Below are 9 probability problems of the kind asked at Jane Street.

All Jane Street questions, every probability question, or the whole bank.