On the occasion of Deepawali festival each student of a class sends greeting cards to the…

Mathematics · JEE Main · NTA Exams — Permutations and Combinations

1. \({ }^{\mathrm{n}} \mathrm{C}_{2}\)
2. \(2{ }^{\mathrm{D}} \mathrm{C}_{2}\)
3. \(\text { 2. }{ }^{\mathrm{H}} P_{2}\)
4. None of these

Answer

(B) 2 ^ D C _ 2

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