That is a very simple mathematics question. 8 {! g5 o( P* h+ ^Let x = Male, y = Female, z = Child公仔箱論壇4 g* x4 H$ d s" y* I* \! W
6x + 3y + z/2 = 100 Formula 15.39.217.76. e* ^4 e8 v: ]2 ]6 e' s
x + y + z = 100 Formula 2 7 z' R g3 q5 K公仔箱論壇Simplify Formula 2 into z, we get z = 100 - x - y Formula 34 N4 J" n: L: P0 h( W% C
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 7 S% B7 P: Z. h M) J% w$ d) a公仔箱論壇Formula 4 can change into 11x + 5y = 100 Formula 55 N. W p6 M5 Q
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. ( j) G0 u' A' L/ F5.39.217.76And 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 = 80.7 q5 z% r' ^6 J, d7 I, B* n% i
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
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。- M' \5 w0 B# u9 D* G, c$ Z, c
11X must be 0 or multiple of 5tvb now,tvbnow,bttvb) H$ F9 Y- S! W* u' k% A0 v
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 childrenTVBNOW 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。6 a b r* [. }# f
5 male 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。0 V6 o' i9 t h# G0 }0 U$ g0 b( b
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
