That is a very simple mathematics question.tvb now,tvbnow,bttvb2 X* _, c: H: R2 q; L' q" f
Let x = Male, y = Female, z = Childtvb now,tvbnow,bttvb1 E4 D2 N/ y+ H h
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。2 W9 M I9 J5 R* y; M# |3 P$ _
x + y + z = 100 Formula 2 " ~" Q- y2 I$ I* GSimplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.761 E6 w A: i8 y4 R$ d; M
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4公仔箱論壇4 B5 K0 Y3 u) c; }: N! u
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。' W3 M$ U. A# V7 i4 n
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.8 O2 d9 w, v2 M6 F) G' _" }* M' D, O% l
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. R* Z, m! Q: Z, x' G. n c) Itvb now,tvbnow,bttvbEventually, 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 7 Q3 P) O, T' j8 g3 j5.39.217.760,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
tvb now,tvbnow,bttvb8 V; _* k! _# C, g! n: l
11X must be 0 or multiple of 5- x B: i; R# u* G: _( s, o
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM