That is a very simple mathematics question.5.39.217.761 v X# K# y/ q/ }. k
Let x = Male, y = Female, z = Child5.39.217.76# _+ u0 C/ j" o/ e- H2 e% K! M
6x + 3y + z/2 = 100 Formula 1 % A( t+ N9 G$ htvb now,tvbnow,bttvbx + y + z = 100 Formula 25.39.217.76+ T& v: j: U) W' D( p
Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.76, W. t% V2 z( p5 U: j+ e
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 ' J$ `8 a- l- j' N' H5.39.217.76Formula 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。9 Z% t( Y3 G2 t" Y$ y& u# F
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. ! b9 e& }2 s( c$ IAnd 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. j, d! i4 c6 b; ~, H" X6 Y7 r( @5.39.217.76Eventually, 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
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11X must be 0 or multiple of 5 # u# X/ w# d* [+ ~/ X6 v" yTVBNOW 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。that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children 9 |3 o6 ~( C' N- Vtvb now,tvbnow,bttvb5 male 4 f3 W2 r' Y6 Z1 e# N) l( p( qTVBNOW 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。9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM