Discount=__________.

A retail offers the following discount scheme for buyers on an article. I. Two successive discounts of 10%. II. A discount of 12% following by a discount of 8% III. Successive discounts of 15% and 5% IV. A discount of 20% The selling price will be minimum under the scheme.

A retailer offers the following discount schemes for buyers on an article. I. Two successive discounds of 10%. II. A discount of 12% followed by a discount of 8%. III. Successive discounts of 15% and 5%. IV. A discount of 20%. The selling price will be minimum under the scheme