By selling 25 articles for a rupee a man gains 20%. How many for a rupee did he buy?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 30
Given that
The selling price of 25 articles is 1 Rupee
then the selling price of 1 article is 1/25 Rupee
Gain % = 20%
Formula used
Gain % = [(S.P. - C.P.)/C.P.] × 100
Calculation
⇒ 20 = [(1/25). - C.P.)/C.P.] × 100
⇒ 0.2 = (1/25C.P.) - 1
⇒ C.P. = 25 × 1.2 = 30 Rupees