That is a very simple mathematics question. $ S1 c5 @+ i- n& DTVBNOW 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。Let x = Male, y = Female, z = Child , D, P& W/ E$ I( @8 p- A/ LTVBNOW 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 & Z0 x }% E* A3 |) }! px + y + z = 100 Formula 2 9 K$ ^1 {/ J' n* x6 ]" s/ S vtvb now,tvbnow,bttvbSimplify Formula 2 into z, we get z = 100 - x - y Formula 3: y* }4 b5 |( _% ?! n
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 45.39.217.777 E* O- U: s# p0 |' a5 e) t2 v$ O
Formula 4 can change into 11x + 5y = 100 Formula 5 2 {3 P: y, l7 Z2 x9 n8 l公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. / {2 ?; `* P M/ o! {tvb now,tvbnow,bttvbAnd 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 = 80.6 A' R, j5 U, `9 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
man,female,children " d3 W! c6 r. t* R公仔箱論壇0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 5 q. O1 m: b; w; h g' Y) C
11x + 5y = 100 Formula 5
4 P# ` w/ ^+ D公仔箱論壇11X must be 0 or multiple of 5 . l- B; O; g4 \公仔箱論壇that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children 3 ^2 O) s4 H3 m- J2 Z9 p公仔箱論壇5 male 公仔箱論壇: G4 K" P3 t$ S9 N& w# B
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
5 q. O1 m: b; w; h g' Y) C
