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CBSE Mathematics Chapter 7 Permutations And Combinations class 11 Notes Mathematics in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Permutations And Combinations class 11 Notes Mathematics latest chapter wise notes for quick preparation of CBSE exams and school based annual examinations. Class 11 Mathematics notes on Chapter 7 Permutations And Combinations class 11 Notes Mathematics are also available for download in CBSE Guide website.

## CBSE Guide Permutations And Combinations class 11 Notes

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## Permutations And Combinations class 11 Notes Mathematics

Download CBSE class 11th revision notes for Chapter 7 Permutations And Combinations class 11 Notes Mathematics in PDF format for free. Download revision notes for Permutations And Combinations class 11 Notes Mathematics and score high in exams. These are the Permutations And Combinations class 11 Notes Mathematics prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the best tips recommended by teachers during exam days.

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**CBSE Class 11 Mathematics Revision Notes Chapter-7 Permutations and Combinations**

**Fundamental Principle of Counting****Permutations****Combinations**

**Fundamental Principle of Counting **

**Addition Law**: If there are two operations such that such that they can be performed independently in and ways respectively, then either of the two operations can be performed in ways.**Multiplication**: If one operation can be performed in ways and if corresponding to each of the ways of performing this operation, there are ways of performing a second operation, then the number of ways of performing two operations together in .**Factorial Notation**: The continued product of first natural numbers is called the ‘ factorial’ and is denoted by .**Permutations**: The number of permutations of n different things taken r at a time, where repetition is not allowed, is denoted by and is given by

- The number of permutations of n different things, taken r at a time, where repeatition is allowed, is .

- The number of permutations of n objects taken all at a time, where object are of first kind, objects are of the second kind, …, objects are of the kind and rest, if any, are all different is

**Combinations**:

- The number of combinations of n different things taken r at a time, denoted by is given by
- Division into Groups: The number of ways things can be divided into two groups containing and things respectively =

## The Permutations And Combinations class 11 Notes

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