By selling 18 table fans for ₹11,664 a man incurs a loss of 10%. How many fans should he sell for ₹17,424 to earn 10% profit?

22

Selling Price of 18 fans = 11664

Loss = 10%

CP of 18 fans = 11664 × \(\frac{10}{9}\) = 12960

Now, CP of 1 fans = \(\frac{12960}{18}\) = 720

New SP of 1 fans = 720 × \(\frac{11}{10}\) = 792

In Rs. 792 = 1 fan is sold

In Rs. 17,424, fans sold = \(\frac{1}{792}\) × 17424 = 22