That is a very simple mathematics question.TVBNOW 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。4 t2 |0 u( z- t) v
Let x = Male, y = Female, z = Childtvb now,tvbnow,bttvb( X8 v6 N& P: ~& `. I N9 V& a7 r
6x + 3y + z/2 = 100 Formula 1 . t5 I j( R, n% |9 ox + y + z = 100 Formula 25.39.217.76( A; [# O$ D6 _
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3TVBNOW 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。+ z! L6 O; j+ B& J6 {: V+ {! j8 C9 {
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb6 U% G& T5 P; _8 q( d# s) W
Formula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇5 T* m4 R. T F' c; Q. f& B2 P
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.76 X! k& U- J8 ^: J C
And 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.tvb now,tvbnow,bttvb, a7 f4 h8 V& B# a" s/ 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