Question

If by selling an article for Rs. 390 a shopkeeper gains 20% , then the cost is

A) Rs. 370 B) Rs. 325 C) Rs. 350 D) Rs. 300

Answer 1

Answer:

Correct answer --- option B) 325 Rs.

here , S P = 390

gain = 20%

→ TO CALCULATE --- C P

formula --

$cp\: \: = \frac{sp \times 100}{100 + gain\%} \\ = > cp = \frac{390 \times 100}{100 + 20} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{390 \times 100}{120} = \frac{13 \times 100}{4} \: \: \: \: \: \: \: \: \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 13 \times 25 = 325$

so,

cost price = rs 325