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)
Animesh anand
yes it can also be done by some approximation method like W.K.B method ,varitional principle method.but for jam preparation it is sufficient method.if you know about this method and want solution then I will provide it.but you will understand only when you know about it.