Optimize red-ball draw probability, prove optimality

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Quick Overview

This question evaluates probabilistic reasoning, optimization and mathematical proof skills by asking how to allocate red and blue balls across two boxes to maximize the probability of drawing a red, testing understanding of probability theory, combinatorics and constrained optimization.

Optimize red-ball draw probability, prove optimality

Company: Thumbtack

Role: Data Scientist

Category: Statistics & Math

Difficulty: medium

Interview Round: Onsite

Overview: This question evaluates probabilistic reasoning, optimization and mathematical proof skills by asking how to allocate red and blue balls across two boxes to maximize the probability of drawing a red, testing understanding of probability theory, combinatorics and constrained optimization.

Read the full Thumbtack Data Scientist interview experience this question came from

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Thumbtack
Oct 13, 2025
mediumData ScientistOnsiteStatistics & Math
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