数学题(英文)

a class total gt 48 ppl.
6 ppl din join any club
1/4 of the student in de clas join badminton club n computer club.公仔箱論壇4 O6 V1 R& e' U4 B9 a
the number of badminton club member which is not computer club member is 2 times de member of computer club.
how many ppl in de clas join badminton club???

收藏分享評分

回復引用

訂閱 TOP

genzo2106

中級忍者

Rank: 3 Rank: 3

2^#

發表於 2007-9-12 01:49 PM | 只看該作者

28 students are badminton club members only.
公仔箱論壇5 u9 x9 D8 \2 L* [
2 students are in computer club only.
7 p3 j3 |! P# {* G$ V) I! v& O
12 students are in both badminton and computer club.
公仔箱論壇# C6 P5 x' B& b, ]6 W
therefore 28+2+12+6=48