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) 
		 
			 
			 
			 
			 
			 
			 
			 
			 
			 
 0 points
 0 points 
 
 
 
             
            

 
                
Eduncle Best Answer
Labour Efficiency Variance
= (Standard Time – Actual Time) × Standard Usage Rate
= (SH – AH) × SR
= (2000 – 2240) × 20
= 4800 Unfavourable.