gain per cent.The cost price of 15 books is equal to the selling price

1.	gain per cent.The cost price of 15 books is equal to the selling price of 12 books. Find the gain per ce6.10 more at 2 a rupee, and then she sells the
Answer» Let the CP of each pen be Rs.x. Then, CP of 12 pens=Rs.12 SP of 12 pens=CP of 15 pnes=Rs.15 now,gain=SP-CP=Rs.(15-12)=Rs.3 gain%=gain/cp100 =(3/12100)%=25% Hence,the gain=25%.

gain per cent.The cost price of 15 books is equal to the selling price of 12 books. Find the gain per ce6.10 more at 2 a rupee, and then she sells the

Answer»

Let the CP of each pen be Rs.x.

Then,

CP of 12 pens=Rs.12

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

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

gain%=gain/cp*100

=(3/12*100)%=25%

Hence,the gain=25%.