Profit and loss

Quantitative Aptitude(IBPS PO)

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A shopkeeper bought 80 pens in Rs. 400. He sold 40 pens at 60% profit and sold the remaining pens at 20% profit. If he had sold all the pens at a 15% profit, how much less profit would he have made?

Rs. 65

Rs. 80

Rs. 100

Rs. 120

None of these

Explanation:

Cost of per pen= 400/80 = 5 Rs/pen Profit on 40 pens(at 60% profit)= 5×40×60%= 120 Rs
Profit on remaining pens(at 20% profit)= 5×40×20%= 40 Rs
Total profit on All the pens(at 15% profit)= 5×80×15%=60

Required difference= (120+40)-60
=100 Rs.

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