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)
Satpal singh
see this attachment i hope you will understand and read N.P. BALI real analysis book for this topic. in this book it is given in more detail https://youtu.be/rsVV0FCSYUo