Permutations and Combinations Class 11 Notes – Chapter 7
What are Permutation and Combination?
When an event happens in m different ways and another event happened in n different ways, then the total happening number of events is m x n.
Equation of Permutation:
If the permutation of a certain number is denoted by n with respect to time t and repetition is not allowed, then the equation is denoted by Pnrand is given by Pnr=n!/(n−r)! and 0≤r≤n.Please refer Permutations and Combinations Class 11 Notes for more revision notes.
CBSE Revision Notes 