Permutations and Combinations Formulas for Class 11 Maths Chapter 7

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Permutations and Combinations Formulas for Class 11 Maths Chapter 7

Permutations and Combinations Formulas for Class 11 Maths Chapter 7

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The number of permutations of n different things taken r at a time is given by \({}^{n}\textrm{P}{r}\) \(=\frac{n!}{(n-r)!}\) where 0 ≤ r ≤ n
\(n!=1\times 2\times 3\times …\times n\)
\(n!=n\times (n-1)!\)
The number of permutations of n different things taken r at a time with repetition being allowed is given as: n^r
The number of permutations of n objects taken all at a time, where p₁ objects are of one kind, p₂ objects of the second kind, …., p_k objects of kth kind are given as: \(\frac{n!}{p_{1}!\:p_{2}!\:…\:p_{k}!}\)
The number of permutations of n different things taken r at a time is given by \({}^{n}\textrm{C}{r}\) \(=\frac{n!}{r!(n-r)!}\) where 0 ≤ r ≤ n

Summary Permutations and Combinations Formulas

We have listed top important formulas for Permutations and Combinations for class 11 Chapter 7 which helps support to solve questions related to chapter Permutations and Combinations. I would like to say that after remembering the Permutations and Combinations formulas you can start the questions and answers the solution of the Permutations and Combinations chapter. If you faced any problem to find a solution of Permutations and Combinations questions, please let me know through commenting or mail.

NCERT Class 11 Maths Formulas By chapters

NCERT Solutions Class 11 Maths by Chapters

Chapter 1 Sets
Chapter 2 Relations and Functions
Chapter 3 Trigonometric Functions
Chapter 4 Principle of Mathematical Induction
Chapter 5 Complex Numbers and Quadratic Equations
Chapter 6 Linear Inequalities
Chapter 7 Permutations and Combinations
Chapter 8 Binomial Theorem
Chapter 9 Sequences and Series
Chapter 10 Straight lines
Chapter 11 Conic Sections
Chapter 12 Introduction to Three Dimensional Geometry
Chapter 13 Limits and Derivatives
Chapter 14 Mathematical Reasoning
Chapter 15 Statistics
Chapter 16 Probability