Question

a man sold 12 pens for the C.P. of 15 pens .then profit is
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Answer 1

Answer:

15x/12 = 5x/4.

Step-by-step explanation:

Let, CP of 12 pens = SP of 15 pens = x.

so, CP of 1 pen = x/12.

so, CP of 15 pens = 15x/12 = 5x/4.

Answer 2

Answer:

Let the CP of each pen be Rs.x.

Then,

CP of 12 pens=Rs.12

SP of 12 pens=CP of 15 pens=Rs.15

now,gain=SP-CP=Rs.(15-12)=Rs.3

gain%=gain/cp*100

        =(3/12*100)%=25%

Hence,the gain=25%.

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