30-Day Sprint142 / 143
MediumProbability

Expected Max of Two Uniforms

Jane StreetCitadel

Two independent Uniform(0, 1) random variables are drawn. What is the expected value of the larger one?

Hints

Find the CDF of the max: P(maxx)=x2P(\max \le x) = x^2.

E[max of n uniforms] = n/(n+1).

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