Jee MainBinomial TheoremJEE Main 2021 (Online) 27th August Morning ShiftMCQ+4 / -12021ENHI\(\sum\limits_{k = 0}^{20} {{{\left( {{}^{20}{C_k}} \right)}^2}}\) is equal to :A\({}^{40}{C_{21}}\)B\({}^{40}{C_{19}}\)C\({}^{40}{C_{20}}\)D\({}^{41}{C_{20}}\)Check AnswerClear SelectionReveal AnswerShow Explanation
