Sock Drawer Problem | Quant Interview Questions #12

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Question:
A drawer contains red socks and black socks. When two socks are drawn at random, the probability that both are red is 1/2. (a) How small can the number of socks in the drawer be? (6) How small if the number of black socks is even?

Step-by-step walkthrough of the sock drawer problem found as Question 1 of Frederick Mosteller's Fifty Challenging Problems in Probability With Solutions

This question is suitable as practice for Quant Trading, Quantitative Researcher, Quantitative Developer, Desk Quant and Data Scientist technical interviews

Free Resources:
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Question Source:
Question 1 of “Fifty Challenging Problems in Probability With Solutions" - Frederick Mosteller'

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