Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Abhishek tripathi 1 Best Answer
1- Identity is an even permutation which does not belong to the set off odd permutation so it's can not be a group. 2- if we operate two odd permutation we get an even permutation, so closure does not hold, so it can not be a group