There are 20 persons among whom two are brothers. Find the number of ways in which we can…
Mathematics · JEE Main · NTA Exams — Permutations and Combinations
There are 20 persons among whom two are brothers. Find the number of ways in which we can arrange them around a circle so that there is exactly one person between the two brothers ?
- 18!
- 3(18!)
- 2(18!)
- None of these
Answer
(C) 2(18!)
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