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Counting & ProbabilityMediumBinomial Theorem, Pascal & Combinatorial Identities

Binomial Theorem, Pascal & Combinatorial Identities · Medium problem

Evaluate (90)+(92)+(94)+(96)+(98)\binom{9}{0}+\binom{9}{2}+\binom{9}{4}+\binom{9}{6}+\binom{9}{8}.