28 students are badminton club members only.tvb now,tvbnow,bttvb( e1 r& P# h! _9 C4 v- T4 F
# j. A- k4 {. U$ t0 Q- c# a0 x' L公仔箱論壇2 students are in computer club only.
% j; \% R! E; f$ V h* p ]: @5 _4 P. }$ d V. n
12 students are in both badminton and computer club.
0 `" p# L! d6 ^4 D& }, wtvb now,tvbnow,bttvbtvb now,tvbnow,bttvb& T# A3 U* D; Q0 W% S' Q
therefore 28+2+12+6=48 |