That is a very simple mathematics question.& ]% h3 j. F/ u0 k7 H9 o
Let x = Male, y = Female, z = ChildTVBNOW 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 J w1 d7 |6 E& z% z4 S' D3 ?6 N
6x + 3y + z/2 = 100 Formula 1 9 X5 T5 B( p' v) \# jtvb now,tvbnow,bttvbx + y + z = 100 Formula 2 y7 I! g; r Z/ ~* D( Z
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇3 P) a" w' L& X s' ]. x* s
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 41 d9 ]# }# _1 Z" H& P$ l7 s4 |3 d
Formula 4 can change into 11x + 5y = 100 Formula 5 0 S/ J6 g! j6 `* k g( R( o( }6 KTVBNOW 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。In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.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。/ h( f- S6 e1 K4 E' K
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.公仔箱論壇: \" j/ o, C- i0 W4 u8 G
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
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11X must be 0 or multiple of 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。. I6 F; L' h6 A# i
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 childrenTVBNOW 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。% G* c* C" p$ y; ~, d" ]
5 male 6 ~, C# Q4 C. D, h5 P Z6 v公仔箱論壇9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM