That is a very simple mathematics question. % n. u( f) m+ k& H$ m, R公仔箱論壇Let x = Male, y = Female, z = Child ) G8 r& @1 |. f' d: [* y6x + 3y + z/2 = 100 Formula 1 + E& D4 P+ S( p3 M$ G# iTVBNOW 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 2 * j) d5 Q8 \; C- C4 D; ~7 S9 }8 vSimplify Formula 2 into z, we get z = 100 - x - y Formula 3 9 @# D* u9 G2 _1 e" k9 ~公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 3 C5 t) e' i) X: @8 L4 {公仔箱論壇Formula 4 can change into 11x + 5y = 100 Formula 5& P& M; T$ E8 ]/ I
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.76, m6 p, R) p, q1 x( @9 W
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. " d/ L6 Z1 V# k* _4 t) L9 b' s公仔箱論壇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,childrentvb now,tvbnow,bttvb" A6 ]/ e! O: M& T
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
8 h' F8 B; W4 q+ P1 x
11X must be 0 or multiple of 5 6 V1 N6 n: Y7 S7 _. P( s& s( L公仔箱論壇that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
