That is a very simple mathematics question.公仔箱論壇% m" U" ~% P8 l7 f; ^$ n$ A4 W
Let x = Male, y = Female, z = Child " w) A6 x1 H& ?6x + 3y + z/2 = 100 Formula 15.39.217.76) s! }+ G- f* |0 U8 U! I' f) B' U8 L
x + y + z = 100 Formula 2 5 h, P/ ^& }4 ^' t. h8 O0 b公仔箱論壇Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 + {4 j- q7 D ]TVBNOW 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。Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4TVBNOW 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。8 m _, ~' C9 ]
Formula 4 can change into 11x + 5y = 100 Formula 5 D$ j- u# _, ~! a5 `) _TVBNOW 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。In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. . K1 C( H/ E6 x, i6 @: S- t6 ?8 u& f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.! i6 e/ o+ N/ b+ D9 G3 d% w
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
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