Problem: A trader had 22 pens and he sold some of them at a profit of Tk. 35 per unit and some at a loss of Tk.l0 per unit. If his total profit was Tk. 635, how many pens did he sell at a loss?
View all: UTTARA BANK | PROBETIONARY OFFICER | WRITTEN QUESTION SOLVE (MATH) | 2009
Correct Answer: Number of pen is 3
Explanation:
Let, the number of pen that is sold at 10 Tk loss per pen = x
Total loss by selling the pen = 10x Tk
Total profit by selling the pen = 35 (22 -x) Tk
According to the question,35 (22 —x) — 10x = 635
=> 770 — 35x — 10x = 635
=> 770 — 635 = 45x
=> 45x = 135
=> x = 3
