Answer: MRP or the Marginal Revenue Product is the addition to total revenue when one more unit of a product is produced and sold in the market. It can be calculated using the given formula,
[tex] MRPn = TRn - TRn-1 [/tex]
Therefore, MRP for the twelfth worker will be,
[tex] MRP_{12} = TR_{12} - TR_{11} [/tex]
which is total revenue at 12th worker minus total revenue for the 11th worker.