Which of the following types of e-commerce involves consumers selling goods and services to other consumers?

A project whose critical path has an estimated time of 120 days with a variance of 100 has a 20% chance that the project will be completed before which day (rounded to nearest day)?

A) 98 B) 112 C) 120 D) 124 E) 220

With a single-server model, increasing the arrival rate by 10 percent and also increasing the service rate by 10 percent will result in:

A) a decrease in the utilization of the server. B) no change in the average number of customers in the service system. C) an increase in the average number of customers in the waiting line. D) an increase in the waiting time in line.