Admission Tests Related Exams
GMAT Exam

At 10-year intervals from 1950 through 2010, the graph shows the total number of passengers, in millions, on the railway system of Nation X. From each drop-down menu, select the option that creates the most accurate statement based on the information provided.

In 90 percent of the commercial airline accidents last year, one or another of a group consisting of only 18 percent of the world's commercial airlines was involved. Since the other 82 percent of airlines were generally flying the same types of airplanes as the accident-prone airlines, significant differences in safety procedures must have been responsible for these differences In safety records.
Which of the following, if true about the world's commercial airlines last year, most seriously weakens the argument above?