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File:Pascal's rule 4c1 plus 4c2 equals 5c2.svg

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English: The first four rows represent 4 choose 1, with the fifth element ("X") always chosen. The next 6 rows represent 4 choose 2 with the fifth element never chosen. The result is 10 unique ways to choose two objects from five objects. See Wikipedia:Pascal's rule#Combinatorial proof.
Date
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Author Guy vandegrift

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Captions

Illustrates proof of the Pascal rule for combinations: C(4,1)+C(4,2)=C(5,2)

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mathematics

inception

1 November 2021

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current07:06, 1 November 2021Thumbnail for version as of 07:06, 1 November 2021450 × 900 (120 KB)Guy vandegriftUploaded own work with UploadWizard

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