Question: Prove the following binomial identity Consider an urn with n red balls and n blue balls inside. Show that each side of the equation equals

Prove the following binomial identity

Consider an urn with n red balls and n blue balls inside. Show that each side of the equation equals the number of ways to choose n balls from the urn.

(:)-Σ . (2η 72 j=0

(:)- . (2 72 j=0

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