Define marginal revenue. State the relation between marginal revenue and average revenue when a firm :
(i) is able to sell more quantity of output at the same price.
(ii) is able to sell more quantity of output only by lowering the price.
Marginal revenue is the addition to total revenue from producing one more unit of output
(i) MR = AR at all the output levels
(ii) MR will be less than AR at all the output levels