Final answer:
An increased number of workers will cause wages to decrease and the marginal revenue product of labor to increase.
Step-by-step explanation:
An increased number of workers in an industry with a perfectly inelastic supply of workers, caused by a huge increase in immigration, will cause wages to decrease and the marginal revenue product of labor to increase. When the supply of workers is perfectly inelastic, the industry cannot easily adjust to changes in the number of workers, leading to a decrease in wages. However, the increased number of workers entering the industry can still increase the output and productivity, resulting in an increase in the marginal revenue product of labor.