Solve !5 || Subfactorial of 5 || Left factorial of 5

In this video I share sub factorial of 5.
Derangement is another important CAT quantitative aptitude topic that holds good weightage and almost every year questions are repeated from this topic. Learn the topic easily here to be able to solve the related questions easily in the exam.

Derangement can be simply defined as a permutational arrangement with no fixed points. In other words, derangement can be explained as the permutation of the elements of a certain set in a way that no element of that set appears in their original positions.

Derangement: n=3,4,5 Inclusion - Exclusion Principle derangement recursive recursion combinatorial argument recursive formula proof by induction recursive determination of derangements

Few topics covered in this video are:

Subfactorial Formula]
[ Left Factorial ]
[ Factoria ]
Subfactorial || Left Factorial || Super Factorial || Zero factorial all are included to Factorial Family, However in this video I explain about Sub factorial.
#SUBFACTORIAL
#LEFTFACTORIAL
#FACTORIAL
#0Factorial
#0!

[intelligent_buds]

Very detailed explanation in very easy n understandable way❤

[rabbiafarooq]

Sometimes I think that she is the second mother of math .And she is here for help us from our evil exams❤❤ ❤