Q78
ArithmeticPercentage, Profit & Loss
A shopkeeper earns a profit of 12% on selling a book at 10% discount on the printed price. The ratio of the cost price to the printed price of the book is
- a.45:56
- b.50:61
- c.55:69
- d.99:125
Answer: (A) 45:56
Selling price = 0·9 × printed price = 1·12 × cost price. So cost : printed = 0·9 : 1·12 = 90 : 112 = 45 : 56. The other ratios do not satisfy this equation.