28 students are badminton club members only.tvb now,tvbnow,bttvb/ R- g/ S+ c3 n, X% E4 X! \
9 U, Z8 r b3 D q2 students are in computer club only.
3 i% \8 D) a6 i7 `9 f/ P0 f5.39.217.77:8898
6 s6 f, t1 ~/ y9 A公仔箱論壇12 students are in both badminton and computer club.
- Q0 f5 S) e8 V$ m$ rtvb now,tvbnow,bttvb
1 U6 v3 o+ J& I公仔箱論壇therefore 28+2+12+6=48 |