Jane Street

Interview Question

Junior Trader Interview
Jane Street

You flip a fair coin an unlimited number of times. If the sequence HHT appears before HTT, you win. What is the probability that you win?

Unlock the Full Solution

Enter your email to get instant access to the complete solution, explanation, and similar practice problems.

Insights on 100+ quant firms, understand where to apply, and maximize your chances.

Get the official 2025 QB Quant Firm Tier List

Check your email inbox — you should get the interview in 1-2 minutes!