Question

tell the answer i will mark as brainlaist​

Answer 1

Answer:

25%

Step-by-step explanation:

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%

Answer 2

here is the answer of your question