28 students are badminton club members only.os.tvboxnow.com9 l1 G8 N9 d1 x5 ~1 Y a
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2 students are in computer club only.tvb now,tvbnow,bttvb0 N k0 L* R; o' U2 P1 Q
9 h1 H7 K7 S' J* vtvb now,tvbnow,bttvb12 students are in both badminton and computer club.公仔箱論壇9 S1 v1 @& w: [4 `2 D+ \" c3 c
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therefore 28+2+12+6=48 |