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)
>


Eduncle Best Answer
Theories that explain the formation of ‘Informal Groups’ are
(i) Propinquity theory
(ii) Similarity or Balance theory