That is a very simple mathematics question. * N1 N& ]4 U9 }* P5.39.217.76Let x = Male, y = Female, z = Child + I2 H8 L. j; C8 `5 l! S$ Otvb now,tvbnow,bttvb6x + 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。; j# V7 G& Z0 }) C
x + y + z = 100 Formula 2 \+ R, t' w, z" @. F( p% e
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。! P+ N- j! F& }! s! ]" Z
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb, {8 b% h: f( ?8 e( a" A2 y
Formula 4 can change into 11x + 5y = 100 Formula 5 0 Z1 [/ u6 T x- L+ btvb now,tvbnow,bttvbIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. " c$ R, _& v) r6 e+ }5 b* P7 rtvb now,tvbnow,bttvbAnd 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. 2 b" n! x- ?) Q: z7 Itvb now,tvbnow,bttvbEventually, 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