That is a very simple mathematics question. 5 U, A% j* a' c: N1 NLet x = Male, y = Female, z = ChildTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。 ^7 B2 z( w) m( J
6x + 3y + z/2 = 100 Formula 1TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。; r9 w% V& \* x' r/ h4 e
x + y + z = 100 Formula 2 * v( L/ E) O+ ]2 I- YTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。Simplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇% k9 a- v6 B( k8 a9 D
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 / ]9 J9 P5 o+ _* ~8 @1 p. U. b0 ?7 W5.39.217.76Formula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇6 `0 B* r/ q& d4 S9 F. `
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. ) r8 K( H0 c& V3 vAnd between 0 and 9, only 0 can give me a single number of y. So, x has to be 0 and y have to be 20. Then put x and y back to formula 1, we get z = 80.5.39.217.76 ?" F& A$ a2 {. M; m& W7 b% A1 a
Eventually, the answer is 20 female and 80 children and no male.作者: alan1234 時間: 2007-10-14 12:19 AM 標題: two answers
man,female,children公仔箱論壇# Z. A5 ~; m O9 e! k8 V
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM