The cost price of 20 articles is the same as the selling price of x articles. If the profit is 25%, then the value of x is:

माना 1 वस्तु का CP = 1। 20 का CP = 20। x का SP = 20। लाभ = 25%, इसलिए SP = 1.25 x CP। 20/x = 1.25, x = 20/1.25 = 16।