Question

By selling 100 pens a shopkeeper gains the selling price of 20 pens. his gain percent is

Answer 1

gain 25 answer --------------

Answer 2

Answer:

The shpkeeper 25%

Explanation:



Let SP of 1 Pen is 1 Rs. 1

SP of 100 pen is Rs. 100

CP of 1 pens is Rs. x

CP of 100 pen is Rs. 100x

According to question,

Gain = SP - CP

20 = 100 - 100x

100x = 80

x=80100=45, x=45

CP of 1 pens = Rs. 45

CP of 100 pens =45×100 = Rs. 80

SP of 100 pens = Rs. 100

∴ gain% = 2080×100 = 25%