That is a very simple mathematics question.tvb now,tvbnow,bttvb G& t+ i1 {& i( {) C
Let x = Male, y = Female, z = Child 5 [0 m/ g, ?0 L. S6x + 3y + z/2 = 100 Formula 1( w: n$ G; J9 a; |; R
x + y + z = 100 Formula 2 & ?/ M- R7 N! mSimplify Formula 2 into z, we get z = 100 - x - y Formula 3- f0 o( H$ R. f& Y0 p
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 45.39.217.77# G& a4 c3 Q2 i8 t# \ ?+ U3 ~% n
Formula 4 can change into 11x + 5y = 100 Formula 55.39.217.77) b4 g2 C. y+ b, T2 \% q2 t
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb X3 c. M/ k$ T S( F- f2 `! 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.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。8 p, Y" w3 V; L$ U
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
9 h) S) I/ C. ]% J- A+ c, u& atvb now,tvbnow,bttvb11X must be 0 or multiple of 5 6 p$ O- R9 P4 M5 \; D3 |that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children 2 f& v T9 N. S公仔箱論壇5 male 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。 X- }: r, H% r7 J
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM