Abone healing machine has n scanners which each scan a mutually exclusive, equal, continuous length of a bone. the machine can detect multiple fractures only when a single scanner scans all of the fractures. what is the probability that a double fracture will be detected given there are only two fractures in the entire body? solve for n = 15.

Out of the 180 students at a summer camp, 72 signed up for canoeing. there were 23 students who signed up for trekking, and 13 of those students also signed up for canoeing. use a two-way table to organize the information and answer the following question: approximately what percentage of students signed up for neither canoeing nor trekking? 72% 40% 54% 98%