Problem: A shopkeeper buys pens, which are Tk. 360 a dozen. He quotes a selling price the customers and offers a discount of 10% realizing that even with the discount he can earn a profit of 20%. What was the initial selling price of each pen quoted by him?
View all: BANK ASIA LTD | WRITTEN QUESTION SOLVE(MATH) | 2005
Correct Answer: TK 40
Explanation:
Selling price of pen by 20% profit = Tk. (100 + 20) = Tk. 120
if buying price is Tk. 100 then selling price is Tk. 120
lfbuying price is Tk. 360 then selling price is Tk. $\frac{120×360}{100}$= Tk. 432
Afier 10% discount or quoted, the price will be = Tk. (100 — 10) = Tk. 90
Again,
If selling price is Tk. 90 then quoted price = Tk. 100
If selling price is Tk. 432 then quoted price = Tk. $\frac{100×432}{90}$ =Tk. 480
lntial quoted selling price = Tk. $\frac{480}{12}$ = Tk. 40
