28 students are badminton club members only.
; |9 b, x9 a" i+ B* y$ Y! ^* r5 t/ R% M
2 students are in computer club only.
; A5 p, r* t8 r* h- R公仔箱論壇4 ^) c7 x9 z8 j5 [( ?% O/ o
12 students are in both badminton and computer club.& l$ R- z* u2 f# f+ F! k, L4 I
; Y3 P% u" w" `: z, i公仔箱論壇therefore 28+2+12+6=48 |