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A Probabilistic Proof of a Binomial Identity

Jonathon Peterson
The American Mathematical Monthly
Vol. 120, No. 6 (June–July 2013), pp. 558-562
DOI: 10.4169/amer.math.monthly.120.06.558
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Page Count: 5
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A Probabilistic Proof of a Binomial Identity
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Abstract We give an elementary probabilistic proof of a binomial identity. The proof is obtained by computing the probability of a certain event in two different ways, yielding two different expressions for the same quantity.

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