That is a very simple mathematics question. 0 X6 T2 X4 k, ]5.39.217.76Let x = Male, y = Female, z = Child公仔箱論壇4 F4 O# f/ y+ f9 l& D1 U
6x + 3y + z/2 = 100 Formula 1公仔箱論壇- z; f! g! V& k3 _
x + y + z = 100 Formula 2' P2 p+ |* z& Y, y2 k
Simplify Formula 2 into z, we get z = 100 - x - y Formula 30 D- g4 _ o0 ?3 M
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 / C5 ~3 M7 C0 A0 |tvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 55.39.217.76( p9 r: u6 [$ l+ X- B, f, {
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.76- z6 s! ]8 p. O, ]: n3 S
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.tvb now,tvbnow,bttvb9 H6 O: x: i- L
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 % z. e" D1 w! r- J6 R. G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 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。5 R# C- ?+ c C+ Z
11x + 5y = 100 Formula 5
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11X must be 0 or multiple of 5公仔箱論壇. L* n* c: m7 [8 p0 @4 w$ u
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children: j; g% t5 S9 h0 D
5 male 2 c/ z. W% E0 Z
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM