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)
Anshum Sharma
see the attached image
can't we slove it by any other method or its detailed solution?
Yes we can, but for this particular Question we can easily solve by this concept.