(1) Let us assume that it was possibleto buy x items with ₹ 90 beforeprice reduction. Amount required to purchasex items = 80% of 90 = ₹ 72 After price reduction, one can buy(x + 15) items with₹90 ∴Reduced price of 15 items= 90 – 72 = ₹ 18 ⇒ Reduced price of one item =