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)
Abhishek singh
If you understand basics of degree of freedom and its relation with Cv and Cp then you will never be confused in this type of question. Here is the detailed discussion attached. Best regards.