A grocer marks his goods 20% above cost price, allows a discount of 10% on the marked price, and on top of that hands over only 900 g whenever a customer asks for 1 kg. His net profit percent is:

Question

Accepted Answer

20. Let 1 kg cost him ₹100. He charges 100 × 1.20 × 0.90 = ₹108 for what he calls a kilogram, but the goods he actually hands over (900 g) cost him ₹90. Profit = 108 − 90 = ₹18 on a cost of ₹90 = 20%. (Dividing 18 by 100 instead of 90 gives the trap answer 18%.)

A grocer marks his goods 20% above cost price, allows a discount of 10% on the marked price, and on top of that hands over only 900 g whenever a customer asks for 1 kg. His net profit percent is:

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