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)
Alka gupta
no need to understand this derivation....this is not part of jam.....only u study stokes theorem and their conditions ... practice lots of qus based on theorem ( greens , G-D , stokes).