Question

if the CP of 15 pens is equal to the SP of 20 pens, find the gain or loss
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Answer 1

Answer :-

Loss is Rs. 0.25

Solution :-

Let the CP of a pen be Rs. 1

So CP of 15 pens = Rs.. 15

SP of 20 pens = Rs. 15

Since CP of 15 pens = SP of 20 pens

So SP of a pen = 15/20

Here

SP = 15/20

CP = 1 = 20/20

CP > SP

So here it is Loss

Loss = CP - SP

= 1 - 15/20

= 1/1 - 15/20

= (20 - 15)/20

= 5/20

= 1/4

= 0.25

So Loss = Rs. 0.25