A manufacturer offers a 20% rebate on the marked price of a product. The retailer offers another 30% rebate on the reduced price. The two reductions are equivalent to a single reduction of :

A man buys eggs at 2 for Re.1 and an equal number at 3 for Rs. 2 and sells the whole at 5 for Rs. 3. His gain or loss percent is :

A men sells two commodities for Rs. 4000 each, neither losing nor gaining in the deal, If he sold one commodity at gain of 25%, the other commodity is  sold at a loss of: