That is a very simple mathematics question.1 Y2 y3 ^0 p9 l
Let x = Male, y = Female, z = Child # q$ Y) i) R2 J2 B$ q公仔箱論壇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。9 }- {6 p: @9 f" G
x + y + z = 100 Formula 2 P ~5 `) G9 u! ]8 [. |
Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.76+ g a* a, N' H. Y8 E3 e% t
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4公仔箱論壇' ~5 @! P2 K4 h0 [. V
Formula 4 can change into 11x + 5y = 100 Formula 5 $ b0 n- O! G' Q! r8 I# OIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. , _, H- p6 o: c& r, ^) l公仔箱論壇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 = 80.6 O; y/ w- c1 K) c" M; }; Z$ ^6 I
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. g9 l n+ u; f; R" P; [
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
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。% P* D" \8 t; K0 G+ }" e6 @: I! T& g
11X must be 0 or multiple of 55.39.217.76/ ^/ r" w' F2 C: n; S4 ^ Q; ~
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children 0 v# _5 S, n+ R5 L7 n( J5.39.217.765 male / F* s$ B: v U$ t& Q2 |/ @9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
公仔箱論壇1 y+ S$ z' J1 \% s& ?
