twinsdragon

That is a very simple mathematics question.
8 r, k* y# `' ?2 ~, iLet x = Male, y = Female, z = Child
" o6 `' j- q# @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。6x + 3y + z/2 = 100   Formula 1TVBNOW 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。" B. _% f' X5 q0 q
x + y + z = 100    Formula 2
0 ^& Z  N" C! hSimplify Formula 2 into z, we get z = 100 - x - y Formula 3& ~6 [% x1 H9 J
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
# @1 a" w% Y1 O' A, ^  {5 TTVBNOW 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。Formula 4 can change into 11x + 5y = 100 Formula 5tvb now,tvbnow,bttvb2 N( u9 Q+ i0 U5 [& g! I3 l% a  W; L2 c
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb! e" y2 U0 a% G* E9 t, u
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.
5 i* a- i" `. D+ w3 yEventually, the answer is 20 female and 80 children and no male.