Madhya Pradesh Police Exam Model Paper 7

Given:
Cost price of 12 pens = Rs. 10
Selling price of 10 pens = Rs. 12
Formula:
Profit = SP – CP
Profit % = (Profit / CP) × 100
Calculation:
Cost price of 1 pen $=10/12$
Selling price of 1 pen $=12/10$
Hence,
Profit ∴ Profit percentage $=\left[\left(44/120\right)/\left(10/12\right)\right]\times 100=44\%$