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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

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

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