Permutation When All Objects are Different

Permutations

Permutations

Permutations When Objects Are All Distinct|Factorial Notation|Exercise Questions|OMR

Permutation OF Identical Objects

Permutation OF Identical Objects

Inclusion & Exclusion Theorem || Permutation OF Alike Objects Taken Same at a Time

Questions based on Circular permutation ||Selections OF Alike & Different thing and illustration

Questions based on Circular permutation || Selections OF Alike & Different thing and illustration

The number of permutations of n different objects taken r(>=3) at a time which include 3 particular objects is

Prove that the no.of permutations of n different objects taken r at a time in which two specified objects always occur together 2!(r-1)(n-2)P_(r-2)