Assistant Trader Interview Questions

578 assistant trader interview questions shared by candidates

Coin Triplets Problem Denote H for head, T for tail in a coin flip. Flip a fair coin many times until either a pattern of HHT or HTT occurs. What's the probability that HHT occurs before HTT? Please elaborate the reasoning.
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Assistant Trader

Interviewed at Jane Street

4.4
Oct 11, 2011

Coin Triplets Problem Denote H for head, T for tail in a coin flip. Flip a fair coin many times until either a pattern of HHT or HTT occurs. What's the probability that HHT occurs before HTT? Please elaborate the reasoning.

A piece of land has a 30% chance of being located over an oil reserve, in which case it is going to be worth 100M. If there is no oil, the land is worth 30M. You are offered an option to buy the land at 40M after inspecting it and ascertaining if there is oil. How much are you willing to pay for this option?
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Assistant Trader

Interviewed at Susquehanna International Group

3.8
Mar 13, 2013

A piece of land has a 30% chance of being located over an oil reserve, in which case it is going to be worth 100M. If there is no oil, the land is worth 30M. You are offered an option to buy the land at 40M after inspecting it and ascertaining if there is oil. How much are you willing to pay for this option?

There were a few bunch of simple math questions and some probability questions. If you toss 4 coins and get 1 dollar for each heads, how much are you willing to pay to play the game? What if you have the chance to toss again one coin? What about two?
avatar

Assistant Trader

Interviewed at Jane Street

4.4
Jan 26, 2014

There were a few bunch of simple math questions and some probability questions. If you toss 4 coins and get 1 dollar for each heads, how much are you willing to pay to play the game? What if you have the chance to toss again one coin? What about two?

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