28 students are badminton club members only.公仔箱論壇& o) w( M; v$ v$ k; ]
. ^* s. l3 h% g0 g, c+ R公仔箱論壇2 students are in computer club only.
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12 students are in both badminton and computer club.
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therefore 28+2+12+6=48 |