Question

If the selling price of 10 pens is the same as the cost price of 12 pens, then find the Gain percent.​

Answer 1

Answer:

The Gain Percent is 20%.

Step-by-step explanation:

Given,

The selling price of 10 pens is the same as the cost price of 12 pens.

And we need to find Gain Percent.

Sol: The Selling Price of 10 Pens = The Cost Price of 12 Pens = A

      Therefore the selling price of 1 pen = A/10

      and the cost price of 1 pen = A/12

Then, the gain% = {(selling price - cost price) x 100}/cost price

                           = [{(A/10) - (A/12)} x 100]÷A/12

                           = [{(6A-5A)/60} x 100]÷A/12

                           = [{A/60} x100]÷A/12

                           = [5A/3]÷A/12

                           =20

Thus, The Gain Percent is 20%.