That is a very simple mathematics question. , ^! Z/ C" ~/ O' s# ~( sLet x = Male, y = Female, z = Child 7 ^) r# U8 c r+ X/ _6 `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。6x + 3y + z/2 = 100 Formula 1 " @) M8 M" A2 O. @3 N3 x' Qx + y + z = 100 Formula 21 f) n; X5 r7 j- Q% A u
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3, z$ T, K, M% f% U9 h l
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 ) m- \' _9 \; }; e9 Twww.tvboxnow.comFormula 4 can change into 11x + 5y = 100 Formula 5tvb now,tvbnow,bttvb* T& p' a6 F2 {, `" J% H% w
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇# O; l# e0 J! g2 C8 C3 p
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.; L2 _7 S, i: M) V( c, u& O
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6 D& z) w1 U5 F h9 e" ~) [' \ n
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
tvb now,tvbnow,bttvb' `+ I( k- d2 i0 K' ?" N
11X must be 0 or multiple of 5& x, L D. h# i d1 J: a
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
