eglakananaj2218 eglakananaj2218

25-01-2024
Mathematics

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40 balls are randomly placed into 10 urns one by one. Let Xₙ be the number of empty urns after the n-th ball has been placed.
(a) Find P(X₂₁=2|X₂₀=3).
(b) Find E[X₃₀].

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