That is a very simple mathematics question. 3 \9 ~/ f7 k) w: \& w公仔箱論壇Let x = Male, y = Female, z = Child % ?) j. I& z4 k, o, ]( I! K# @' stvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 15.39.217.77) ?' [: B H" I9 _* {- }/ D
x + y + z = 100 Formula 2tvb now,tvbnow,bttvb% L' h/ c: v$ {# U# h g h
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 , e1 c1 |" ^' w# LSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 : o2 O9 {: [( ?' j8 J8 RFormula 4 can change into 11x + 5y = 100 Formula 55.39.217.770 e9 g3 m6 H7 T3 K7 c: _
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.7 r4 k# D5 @* L% l6 G {/ C
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.tvb now,tvbnow,bttvb- u! n4 \; n+ l
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,childrenTVBNOW 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。6 u) d- Z' z) h. d. p: M" f4 f
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
tvb now,tvbnow,bttvb$ v t( T% A, y8 b: g
11X must be 0 or multiple of 5 0 c4 d! }, F$ L6 i' itvb now,tvbnow,bttvbthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
