# Permutations and Combinations Formulas for Class 11 Maths Chapter 7

## Permutations and Combinations Formulas for Class 11 Maths Chapter 7

Are you looking for Permutations and Combinations formulas for class 11 Chapter 7? Today, we are going to share Permutations and Combinations formulas for class 11 Chapter 7 according to student requirements. You are not a single student who is searching for Permutations and Combinations formulas for class 11 Chapter 7. According to me, thousands of students are searching Permutations and Combinations formulas for class 11 Chapter 7 per month. If you have any doubt or issue related to Permutations and Combinations formulas then you can easily connect with through social media for discussion. Permutations and Combinations formulas will very helpful to understand the concept and questions of the chapter Permutations and Combinations. I would like to suggest you remember Permutations and Combinations formulas for the whole life. It also helps you with higher studies.

1. 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
2. $$n!=1\times 2\times 3\times …\times n$$
3. $$n!=n\times (n-1)!$$
4. The number of permutations of n different things taken r at a time with repetition being allowed is given as: nr
5. 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, …., pk objects of kth kind are given as: $$\frac{n!}{p_{1}!\:p_{2}!\:…\:p_{k}!}$$
6. 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 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