That is a very simple mathematics question.5.39.217.76 R8 j; A: d8 \& M
Let x = Male, y = Female, z = Child( \, L( Z& P0 j0 l# I3 [
6x + 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。( s) {+ T( V2 ?3 A- y: c! f
x + y + z = 100 Formula 2 # |7 E3 m6 [; |7 P% c& qSimplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇- c" N$ g; x7 w5 v, u% e
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 9 \5 S* a( G6 }, p$ \& v2 O! f* Gtvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 5 & S+ A; F+ P5 n- V) |. I0 Mtvb now,tvbnow,bttvbIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. % J8 g9 s$ U ]% l' N, }* `, M4 cAnd 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.公仔箱論壇( n4 K0 w& |' B
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
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 - d/ t2 `- m) ]11x + 5y = 100 Formula 5
. F; ]% U7 c) J) `" h8 J2 ^; I: K5 f11X must be 0 or multiple of 5公仔箱論壇! | u( S: K8 y: e4 }
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 childrentvb now,tvbnow,bttvb1 }. T7 K( s V: I/ Y+ k N1 `: B
5 male + }# m F3 ?" e( F( @9 F4 n9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
