involving students' sport preferences. Assume that there are 55 students: 28 who enjoy tennis, and 14 who enjoy neither tennis nor swimming. Answer the following questions. If the size of the given...

Extracted text: involving students' sport preferences. Assume that there are 55 students: 28 who enjoy tennis, and 14 who enjoy neither tennis nor swimming. Answer the following questions. If the size of the given set can not be determined, enter "cnbd" (without the quotes). (1) How many students enjoy both sports? (2) How many students enjoy swimming but not tennis?