MCQOPTIONS
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				| 1. | 
                                    Which of the following concepts represents the extra revenue a firm receives from the services of an additional unit of a factor of production? | 
                            
| A. | Total revenue | 
| B. | Marginal physical product | 
| C. | marginal revenus product | 
| D. | Marginal revenue | 
| Answer» D. Marginal revenue | |