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)
Kalai
The formula for span of control is not n(n-1) for cross relationship . please use this formula to arrive the answer. r=n(2^n/2 +n-1) this is based on graicunas theory