Question

A stationary shopkeeper sold 600 pens at a profit of 15%. If a pen cost him ₹6,find the selling price of all the pens.

Answer 1

Find the selling price of 1 pen:

15% profit = 15% x ₹6 = 0.15 x 6 = Rs 0.90

selling price of 1 pen = 6 + 0.9 = ₹6.90

Find the selling price of 600 pens:

1 pen = Rs 6.90

600 pens = 6.9 x 600 = ₹ 4140

Answer; The selling price of all the 600 pens is ₹4140