Permutations and Combinations

JEE Advanced · Mathematics · 28 past questions

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1. Q14 2017 Paper 1

   Words of length 10 are formed using the letters A, B, C, D, E, F, G, H, I, J. Let $x$ be the number of such…

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2. Q15 2017 Paper 2

   Let $S=\{1,2,3,\ldots,9\}$. For $k=1,2,\ldots,5$, let $N_k$ be the number of subsets of $S$, each containing…

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