Symbiosis National Aptitude Test SNAP 2012 Paper

Let the quantity bought be 12x, 15x and 20x kg respectively.
Total cost price = 100 × 12x + 80 × 15x + 60 × 20x = 1200x + 1200x + 1200x = 3600x
Selling price of first two quantities at profit of 20%
=

120

100

×2400x = 2880x
Total selling price = 3600x (No profit no loss)
∴ Selling price of third quantity = 3600x – 2880x = 720x
∴ Loss percentage =

1200x−720x

1200x

×100 = 40%