28 students are badminton club members only.
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2 students are in computer club only.公仔箱論壇2 l5 b2 E3 C- \5 M; s; O, X0 r
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12 students are in both badminton and computer club.5.39.217.76/ T: J: o; B7 u% I
* g3 q6 k) q: o- jtherefore 28+2+12+6=48 |