How much articles are sold? I. The total profit obtained is Rs. 1596. II. The cost price of article is Rs. 632. III. The selling price of per article is Rs. 765.

Profit per article = Selling Price - Cost Price = 765 - 632 = Rs. 133. Total profit = Rs. 1596. Number of articles = Total Profit / Profit per article = 1596/133 = 12. Statement I gives total profit, Statement II gives cost price, Statement III gives selling price. All three are needed because profit per article requires both SP and CP (from II & III), and then number of articles requires total profit (from I). So all three statements are necessary.