单选题The students in a certain physical education class are on either the basketball team or the tennis team, are on both these teams, or are not on either team. If 15 students are on the basketball team, 18 students are on the tennis team, 11 students are on both teams, and 14 students are not on either of these teams, how many students are in the class?A48B40C36D30E28
单选题
The students in a certain physical education class are on either the basketball team or the tennis team, are on both these teams, or are not on either team. If 15 students are on the basketball team, 18 students are on the tennis team, 11 students are on both teams, and 14 students are not on either of these teams, how many students are in the class?
A
48
B
40
C
36
D
30
E
28
参考解析
解析：
The number of students on one but not both of the two teams is the sum of the number of students on the basketball team plus the number on the tennis team minus the number on both teams: 15+18-11 =22. Since 22 students are on the basketball or the tennis team and 14 students are not on either team, there are 22+14 or 36 students in the class.
The number of students on one but not both of the two teams is the sum of the number of students on the basketball team plus the number on the tennis team minus the number on both teams: 15+18-11 =22. Since 22 students are on the basketball or the tennis team and 14 students are not on either team, there are 22+14 or 36 students in the class.
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