twinsdragon

That is a very simple mathematics question.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。' X' h- b1 i$ |: e, \) B2 ?1 b
Let x = Male, y = Female, z = Child
6 t- b* Z3 g3 ~+ v+ VTVBNOW 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。6x + 3y + z/2 = 100   Formula 1
% l" a! l# e5 ^4 y  m: }x + y + z = 100    Formula 2
; W9 }3 w- P6 Y; c" @) m' a' i5.39.217.76Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
' ]5 h" a7 `' w) S公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4" U( |8 K  m7 I2 M
Formula 4 can change into 11x + 5y = 100 Formula 5
+ Q' _7 V) ^% k$ I& w; DIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.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。( L% i* \+ ]8 S/ X4 o5 E
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.
* Y" p1 O6 g* {6 [% YEventually, the answer is 20 female and 80 children and no male.