Permutation and Combination are two separate ways to represent a group of elements. When the order of arrangement is not considered in the arrangement, then we call it a combination. If the order of arrangement is considered in the arrangement, then we have a permutation. We can say that a permutation is an ordered combination. In this video the basic concept of Combination has been described with the explanations with examples. 7 examples related with real life has been described here step by step to find out the combination more easily. Permutation in notation written as P(n,r) Combination notation is written as C(n,r) Permutation is related with selection of r objects from n objects. It is connected with arrangement.