That is a very simple mathematics question. 4 S( i( s, e$ e3 k2 E+ E. s9 z" ~公仔箱論壇Let x = Male, y = Female, z = Child ' n" h" A5 K4 `* {+ _8 Y6x + 3y + z/2 = 100 Formula 1+ F1 n- ^0 Y! g& l; t. P
x + y + z = 100 Formula 2公仔箱論壇0 ?+ X- v+ @: k3 K1 M; ]& l" ^' A4 ^
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb( a6 w* d) x, d& _
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 5 s% |5 }0 ^! a8 d6 W& I; e3 BTVBNOW 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。Formula 4 can change into 11x + 5y = 100 Formula 5 5 I1 o5 K2 W/ k& b) @, O6 w公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. " W Q0 {( K: a, ~; i* a7 ]: eAnd 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.tvb now,tvbnow,bttvb6 p. c0 h4 i! R; M3 X" D9 [6 L' s
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
- ^& H' a9 a: l) \4 rTVBNOW 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 must be 0 or multiple of 55.39.217.77& @: X3 C& c2 K l# e
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children ! o) t% [! N! D& {/ n! F5.39.217.775 male : A y; {1 e3 k8 D/ Z5 a3 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。9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM