The number of ways of dividing 20 persons into 10 couples, is

Mathematics · JEE Main · NTA Exams — Permutations and Combinations

1. \(\frac{20!}{2^{10}}\)
2. \({ }^{24} C_{10}\)
3. \(\frac{20!}{(2!)^{9}}\)
4. None of these

Answer

(D) None of these

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