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)
Ruby negi
if we have electrons then due to spin, two particles occupy one state with up and down spin. but here particle is not mention so u have to consider one particle in one state due to Pauli exclusion principle..