That is a very simple mathematics question. * S; M& G1 g7 F! r" U: T公仔箱論壇Let x = Male, y = Female, z = Child' M4 D6 x; K1 B) o: l
6x + 3y + z/2 = 100 Formula 1 ( c7 O, `0 e/ M) L9 l% MTVBNOW 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 + y + z = 100 Formula 2TVBNOW 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 N8 Y2 l! P* t0 n3 @" N; b
Simplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.76+ k& q8 G, K( q, Q3 D# V
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4% ~$ j7 z6 Y/ b3 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。) J/ G) [$ }$ Z7 s; K
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. 1 @* h" u1 q: m, Jtvb now,tvbnow,bttvbAnd 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. + t( z: [' a8 b2 e- ^* T" g! @tvb 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
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11X must be 0 or multiple of 5 $ O# a( r7 M, F$ M, {* [2 ZTVBNOW 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 4 Q4 i T" c7 z9 _' ?, wtvb now,tvbnow,bttvb5 male 7 L1 e* B. i6 f7 C4 p/ P# f8 |9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM