If ^ n C_ r denotes the number of n things taken r at a time, then the value of…

Mathematics · JEE Main · NTA Exams — Permutations and Combinations

1. \(n+2 C_{n}\)
2. \({ }^{n+2} \mathrm{C}_{r+1}\)
3. \({ }^{n+1} \mathbf{C}_{n}\)
4. \({ }^{n+1} \mathbf{C}_{r+1}\)

Answer

(B) ^ n+2 C _ r+1

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