What kinds of expected-value questions do interviewers ask?

Pricing dice and card games, deciding whether to accept or reject a bet, optimal-stopping problems ('keep rolling or stop?'), and EV with re-rolls. They test trading judgement as much as arithmetic.

How do I get faster at expected-value problems?

Practise setting up EV by conditioning on the first outcome, and learn to spot recursion (where the EV refers back to itself). NeetQuant's Take the Bet game drills rapid positive- versus negative-EV decisions under time pressure.

Is expected value enough, or do I need variance too?

For pure pricing, EV often suffices, but traders are paid to manage risk - many interviews follow up by asking about variance or how the answer changes if you can only play once.

Expected Value Interview Questions

Expected value is how traders price decisions. These questions train the EV reasoning behind games, bets, and stopping problems that interviews love to test.

These questions cover the EV of games and bets, optimal stopping, and 'should you take this bet?' decisions under uncertainty - the kind of pricing judgement trading desks test relentlessly.

The skill being tested is translating a messy scenario into a clean EV calculation - and knowing when variance, not just the mean, should change your decision.

147 expected value questions · 99 free to practise now.

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Frequently asked questions

What kinds of expected-value questions do interviewers ask?: Pricing dice and card games, deciding whether to accept or reject a bet, optimal-stopping problems ('keep rolling or stop?'), and EV with re-rolls. They test trading judgement as much as arithmetic.
How do I get faster at expected-value problems?: Practise setting up EV by conditioning on the first outcome, and learn to spot recursion (where the EV refers back to itself). NeetQuant's Take the Bet game drills rapid positive- versus negative-EV decisions under time pressure.
Is expected value enough, or do I need variance too?: For pure pricing, EV often suffices, but traders are paid to manage risk - many interviews follow up by asking about variance or how the answer changes if you can only play once.