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)
Mahak
dirac delta in three dimension is very useful in emt rather that mp at iit jam level ,you should study it very carefully also some integrals are easily solveable when given in terms of dirac delta using property of dirac delta