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)
Deepak singh 1
Refer attached option a is correct
can you explain in a easy manner
this is theoretical question . For X1 - (can't choose 1 , possible values are 2,3and 4 . So total 3 ) . Now for X2 ( We can't choose 2 , left with 2 possible values and do also replace by X1 .so total 3 ) . Now for X3 (can't choose 3, and X1 and X2 are already fixed .So total- 1 ) . similarly for x4 (it will be unique , so total is 1 ) . So 3×3×1×1=9