来自贾棋的问题
Giventhe100studentsintheSpringdaleHighSchoolseniorclass,38studentsaretakingmath,45studentsaretakingpsychology,and12studentsaretakingbothclasses.Howmanystudentsintheseniorclassaretakingexactlyoneofthetwoclasses?
Giventhe100studentsintheSpringdaleHighSchoolseniorclass,38studentsaretakingmath,45studentsaretakingpsychology,and12studentsaretakingbothclasses.Howmanystudentsintheseniorclassaretakingexactlyoneofthetwoclasses?

