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A group of students could attend choir and orchestra hobby group as they wish. Among 110 female students, 35 only attend the choir, 26 only attend the orchestra, 9 attend both, while the rest 40 attend neither. Among 120 male students, 49 only attend the choir, 14 only attend the orchestra, 12 attend both, while the rest 45 attend neither. Which of the following statements must be true?
Indicate all such is/are true.
B,C显示答案
以上解析由 考满分老师提供。
