Permutations And Combinations Formulas for JEE 2026
22 formulas in Permutations And Combinations (Maths) How many can you recall?
Permutations (ordered selection without repetition)
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Combinations (unordered selection)
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Binomial coefficient identities (symmetry and Pascal)
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Circular permutations (distinct objects around a circle)
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Derangements (no fixed point permutations)
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Stars and bars (non-negative integer solutions)
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Multinomial coefficient (ordered partition of distinct objects)
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Combinations with repetition (multiset selection)
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Distributing distinct objects to distinct boxes (functions)
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Positive compositions (each part at least 1)
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Necklace / bracelet (rotations and reflections)
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Vandermonde’s identity (convolution of binomials)
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Circular permutations (distinct objects)
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Permutations of multiset $\frac{n!}{p!q!r!}$
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Derangements $!n$
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Combinations ${}^n C_r$
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Symmetry ${}^n C_r = {}^n C_{n-r}$
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Stars and bars (non-negative integers)
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Multinomial coefficient
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Multiplication principle of counting
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Permutations ${}^n P_r$
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Permutations with repetition $n^r$
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