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- A shopkeeper by selling 21 items earns a profit equal to the selling price of 1 item.
Question 1:
A shopkeeper by selling 21 items earns a profit equal to the selling price of 1 item. What is his profit percentage? A. 5%
Feedback Let say cp of 1 = c
Selling price of 1 = s
Selling price of 21 = 21s
Cost price of 21 = 21c
Profit = 21s - 21c
Profit = s given
21s - 21c = s
20s = 21c
s = 21c/20
Profit % = {(s-c)/c }* 100
= {(21c/20 - c)/c}×100
= 5 %
Selling price of 1 = s
Selling price of 21 = 21s
Cost price of 21 = 21c
Profit = 21s - 21c
Profit = s given
21s - 21c = s
20s = 21c
s = 21c/20
Profit % = {(s-c)/c }* 100
= {(21c/20 - c)/c}×100
= 5 %
B. 5.5%
C. 4.5%
D. 4%
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