Top 50 Conditional Probability Interview Questions
The most frequently asked Conditional Probability questions across all roles and companies, ranked by real interview frequency. Updated daily.
Compute the expected waiting time to see two consecutive heads when flipping a fair coin.
Virtu Financial
Susquehanna International Group
AKUNA CAPITALCompute the probability that two fair six-sided dice add up to 9 by counting favorable outcomes over total outcomes.
CME Group
Sberbank
Citadel SecuritiesCompute the probability that the sum of two fair dice is greater than 8 by counting favorable outcomes.
Bloomberg
Santander
DeloitteUse expected value and variance to price a 100-flip biased-coin game and determine the fair entry fee for a risk-neutral player.
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Explain conditional probability and show how to compute the probability of one event given that another event occurred.
BarclaysCompute the probability that two balls drawn without replacement are different colors.
AKUNA CAPITALSusquehanna International Group
Manpower BelgiumUse worst-case reasoning to find the minimum number of sock draws needed to guarantee a matching pair.
Voloridge Investment ManagementSusquehanna International Group
Weiss Asset ManagementCompute the probability of drawing two blue marbles in sequence without replacement.
Cobblestone EnergyWeiss Asset Management
Point72