Question
What will be the difference between the number of Pen
sold by shopkeeper A and number of Marker's sold by shopkeeper A.Solution
ATQ, Number of Pen's sold by shopkeeper A = 140 – 40 = 100 Number of Pencil's sold by shopkeeper A = 39/25 × 100 = 156 Number of Pencil's sold by shopkeeper B = 156/1.3 = 120 Number of Marker's sold by shopkeeper A = 5/3 × 120 = 200 Number of Marker's sold by shopkeeper B = 90% of 200 = 180 
Required difference = 200 - 100 = 100
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