When a firm’s total revenue is at the maximum, marginal revenue is? by Sunday | Aug 5 | Economics WAEC | 0 comments A. at the maximum B. negative C. zero D. positive E. constant Correct Answer: Option C – zero Users Also Read These:The relationship between the marginal revenue (MR)…In the theory of production and cost, the average…If the fixed cost of a firm is 800.00 Naira and it's…At the point where marginal revenue of a monopolist…When the total products are at its maximum marginal…