The graph shows the number of minutes studied by both Swapnil and Satyendra in one week. On an average, how many more minutes per day did Swapnil study more than Satyendra?
Difference between Swapnil and Satyendra day wise(Swapnil-Satyendra) -
Monday=-10Tuesday=10 Wednesday=-20Thursday=-30Friday=-20Saturday=40Sunday=40
Therefore, -10 + 10 -20 -30 -20 + 40 + 40 = 10
Average = 
= 1.428 minutes. Swapnil studied 1.428 more minutes per day than Satyendra.
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