28 students are badminton club members only.
- r! \+ R- E& x( U; utvb now,tvbnow,bttvb
& b: {: K8 k1 x7 ~7 y, b2 students are in computer club only.tvb now,tvbnow,bttvb: H2 l+ Q, b3 P/ S3 c8 t! d: Q
: Q2 O {$ L- [) y* \公仔箱論壇12 students are in both badminton and computer club.
" U+ N2 Q) u4 U8 I7 f+ ]! ntvb now,tvbnow,bttvb5.39.217.770 n" Z+ O8 H8 V5 q
therefore 28+2+12+6=48 |