A trader sells an article at a 15% profit. If he buys it at 10% less and sells it for Rs. 4 less, he still makes a 25% profit. Find the original cost price. MCQ with Answer and Explanation

Let initial Cost Price = 100x. Initial Selling Price = 115x. New Cost Price = 90x. New Selling Price = 90x * 1.25 = 112.5x. Difference = 115x - 112.5x = 2.5x. 2.5x = 4. x = 1.6. Cost Price = 100 * 1.6 = 160.