twinsdragon

That is a very simple mathematics question.5.39.217.77/ {+ O7 b0 W0 e
Let x = Male, y = Female, z = Child
1 M  ]+ n3 }# D7 Ttvb now,tvbnow,bttvb6x + 3y + z/2 = 100   Formula 1
; s% [7 {! M; R# Nx + y + z = 100    Formula 2TVBNOW 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。2 H2 C6 H! m  m+ Q8 T7 B- O9 f5 x
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
0 }8 q) r% |! X8 E公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb9 t9 }0 E( h& N! F# P- G
Formula 4 can change into 11x + 5y = 100 Formula 5
- ]1 g. G# \$ S' A/ B/ D3 Z- iIn 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。# S7 @( @3 j$ c, x6 n0 g
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.
  R6 j9 y: Z! z+ s! `4 S0 B) L9 ^公仔箱論壇Eventually, the answer is 20 female and 80 children and no male.