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
in this qus they say " use variation of parameter method " this is not subjective qus that we have to solve this by this method....we can find PI by any other simple method....here in two step we can find PI