1. A pen is sold at 10% discount and the selling price is $8.1. If it is sold at a 20% and sold it for the orginal marked .What was his profit per cent?
2. A Chinese writing pad marked at $240 is sold at discount of 5% .
(a) Fing the tatal number of writing pad.
(b) If the cost price of the writing is $150,find the profit per cent.
3. the owner of a light shop bought a crystal light for $x. He raised the marked price of the light 60% higher than the cost price.Later it was sold to a customer at a discount of 25%.
(a) Find the profit per cent made by the owner.
(b) If the customer bought the light for $3780,find value of x.
(c) If the light was sold to the customer at a discount of 35% instead, did the owner still make a profit ? Explain your answer.
更新1:
cocongyt , 我吾係好明3(a) 條式可吾可以簡單少少
