Permutations and Combinations Basics

How to Calculate Combinations ? Important Note :  To calculate combinations, First you should calculate all the equivalent permutations.  Later you should correct this list by cutting out duplicates / repetitions.…

Combination As we have already discussed, the collection of letters is important here, not the order. That means, if you have ABC in your set that's enough. So you cant…

Permutation Assume that I have 4 letters (A, B, C and D). Now if anybody asks me to write down all the permutations of 3 of these letters..... ABC   BAC   CAB   DAB…

Important Info Friends, in this post we shall discuss about another important topic of Aptitude Section, Permutations and Combinations. Lets start with definitions. Of course all of you might have already…