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)
Amol ashok pawar
https://m.youtube.com/watch?v=0gYTkwxphRI And https://m.youtube.com/watch?v=LCTaPt60vm4 This will give you answers as well as explanation