GMAT Exam Dumps : Graduate Management Admission Test (2022)

Last month Ann, Bob, Carl, Dave, and Ellen volunteered at a hospital. The number of hours that Carl volunteered was equal to the average (arithmetic mean) number of hours volunteered by the 5 people. If the number of hours that Carl volunteered was also equal to the total number of hours that Ann and Bob volunteered, then the total number of hours that Dave and Ellen volunteered was how many times the number of hours that Carl volunteered?

Editorial: For the past two years, our dty has used photo radar to enforce speed limits at several Intersections, automatically photographing cars, measuring their speeds, and mailing tickets to offending drivers. In the second year of the program, the annual number of violations observed by photo radar dropped by 5 percent. This shows that the program has been effective at reducing speeding on the monitored streets.

The editorial's reasoning is most vulnerable to criticism on which of the following grounds?