That is a very simple mathematics question. 7 b& @8 }$ y* B: dLet x = Male, y = Female, z = Child5.39.217.760 n- {3 k2 s, u3 P" E
6x + 3y + z/2 = 100 Formula 1公仔箱論壇2 l5 r3 g$ v9 G/ P1 q$ j
x + y + z = 100 Formula 2公仔箱論壇( ]! [/ D% Q( o0 F: M5 ?
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 7 B q" ^8 Q3 H/ u公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 45.39.217.76) K! ~4 v& F b% l
Formula 4 can change into 11x + 5y = 100 Formula 5 - H" u. D6 \8 y$ ?In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. ' N) S( \5 ` M) G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.! g; w! I- u$ u8 I/ W* @" a: X9 B7 o
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
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 9 S i+ q1 `/ S( M PTVBNOW 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。11x + 5y = 100 Formula 5
3 L9 u3 N+ ?+ R: S' I5.39.217.7611X 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。9 I0 y% v& e {6 n" \7 g" f
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children5.39.217.76* u, i7 W7 T* D9 K8 g& |% S' b" ]7 z
5 male " n) y# J* a: S2 tTVBNOW 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 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
