That is a very simple mathematics question.os.tvboxnow.com, r3 H* q6 C. q2 g. @3 F8 R
Let x = Male, y = Female, z = Child 1 ?" c; b& w( nos.tvboxnow.com6x + 3y + z/2 = 100 Formula 1& x1 G/ j* ?2 M/ k) U! Y+ m
x + y + z = 100 Formula 2TVBNOW 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 D( e# T9 O% L0 O6 g
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb5 l, v/ I& a* E! E! x3 K e
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4$ w+ E9 G8 F/ B; }. v0 C
Formula 4 can change into 11x + 5y = 100 Formula 5 * L0 ? M/ C( {) g! qIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇; J9 H- K% A* @* Y, h+ K
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. ! V; ~ s5 I: s6 |8 f8 B' M1 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