That is a very simple mathematics question. 3 Q2 i% Q* k% x+ WLet x = Male, y = Female, z = Child M, l6 }/ W! Z) z5 l公仔箱論壇6x + 3y + z/2 = 100 Formula 1 4 q( z! c" O7 P5 b5.39.217.76x + y + z = 100 Formula 2 5 W' s/ j. A) |8 w7 ^; B4 ~+ G3 L5.39.217.76Simplify Formula 2 into z, we get z = 100 - x - y Formula 3& T! z i+ h1 s6 u/ E, ?/ p
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 5 K& J H2 e8 C4 I# uFormula 4 can change into 11x + 5y = 100 Formula 5 5 b2 \- R+ G3 c$ k& o9 i$ T. D公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. 3 p3 f n, b# y" z# xAnd 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. " }7 C- P! \" A6 E5 l* I4 QTVBNOW 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。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
