Counting & ProbabilityChallengeBinomial Theorem, Pascal & Combinatorial Identities ShareBinomial Theorem, Pascal & Combinatorial Identities · Challenge problemFind the coefficient of x50x^{50}x50 in the expansion of (1+x)100(1−x)100(1+x)^{100}(1-x)^{100}(1+x)100(1−x)100.A−(20025)-\binom{200}{25}−(25200)B−(10025)-\binom{100}{25}−(25100)C(10025)\binom{100}{25}(25100)D−(10026)-\binom{100}{26}−(26100)Check Show answer Walk through it step by step Practice more like this Review this concept