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)
Chandra prakash
dear see this.....u get 4d ...and put the value in equation and see..I did it..see attachment,so 2d is correct answer....
hope you get it