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)
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Bidyut sinha
please see the attached picture. After step 4, just use Parallel Axis theorem and do Integration within limit 0 to l/2