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)
Shashi ranjan sinha
here I used the result .... AB = A [ B1, B2,....Bn] = [AB1, AB2,.....,ABn ], where B1,B2,...,Bn are columns of B