28 students are badminton club members only.tvb now,tvbnow,bttvb7 x8 K: q8 |# k. U: k: m
公仔箱論壇, P8 s% D2 K5 f$ P
2 students are in computer club only.tvb now,tvbnow,bttvb; ?1 {; h, G" I/ H/ @9 G) H9 Z
: E* K6 V5 O9 t! U$ G! c' z
12 students are in both badminton and computer club.
4 Z* E: G2 }& f( A3 j- c8 m公仔箱論壇公仔箱論壇# p3 q* F% L. R6 a
therefore 28+2+12+6=48 |