That is a very simple mathematics question. ; D' H, e7 X3 w; NLet x = Male, y = Female, z = Child ' t' N& s% _: O4 i2 ~5.39.217.766x + 3y + z/2 = 100 Formula 1 ' K' N, I$ W. ix + y + z = 100 Formula 2公仔箱論壇0 H! f+ |8 O5 X1 S
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 7 Z4 V7 f' |% f5 X公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb! B. _: }; A7 n
Formula 4 can change into 11x + 5y = 100 Formula 5; U4 K; S& A5 j1 T% b8 B3 F
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇, | t( V9 u" g6 H1 T) {- ]
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. 4 w) Q" W3 ^" Z( g7 bEventually, 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,childrentvb now,tvbnow,bttvb3 C9 x: `' `6 M4 m4 u
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
5.39.217.76' Z* x# D: _. I: [0 D
11X must be 0 or multiple of 5 / ]- {' K/ _( T% R) T/ fthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children % G2 F, q$ l& V3 a* g" f公仔箱論壇5 male 公仔箱論壇4 T7 O% b: X$ g( c1 L
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM