琢磨了一个小时完全没有头绪，感觉进到思维死角，绝望，恳请NN拔刀相助！

A recent report determined that although only 3 percent of drivers on Maryland equipped their vehicles with radar detectors, 33 percent of all vehicles ticketed for exceeding the speed limit were equipped with them. Clearly, drivers who equip their vehicles with radar detectors are more likely to exceed the speed limit regularly than are drivers who do not.

The conclusion drawn above depends on which of the following assumptions?

Answer: B     Drivers who are ticketed for exceeding the speed limit are more likely to exceed the speed limit regularly than are drivers who are not ticketed.

答案是在补充gap么？对于这种percentage 的题目应该如何理解？非常非常感谢！