That is a very simple mathematics question. 7 _5 V9 X1 Y* u/ X/ l* u# }4 `( L公仔箱論壇Let x = Male, y = Female, z = Child( Z4 ~6 |. R7 C) X& R. N
6x + 3y + z/2 = 100 Formula 1 7 |7 [1 t: P1 y2 ]" q! ETVBNOW 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。x + y + z = 100 Formula 2 ( y) S( a- o$ Z公仔箱論壇Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 ' J0 ~8 i& A6 _9 a; ~2 c/ S5.39.217.76Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 % ?: e" q* V7 G0 D' `Formula 4 can change into 11x + 5y = 100 Formula 5TVBNOW 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。1 {5 w( S. @" R( {, f8 O
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. 4 l$ _4 N1 j9 x! F3 r* a1 vAnd 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. 2 w# x/ k3 ?, j' I公仔箱論壇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 5 ?# o. V4 i' |/ u! B' S' S5.39.217.7611x + 5y = 100 Formula 5
5.39.217.76' Q# W S" l; r2 x: P) y3 p) {
11X must be 0 or multiple of 5 8 x- T/ v) h7 |: o N& ~$ H7 Gthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children [- f4 J' h( u% t% ^# GTVBNOW 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。5 male 0 U* `3 p# _& g m! ~/ U- `
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
