twinsdragon

That is a very simple mathematics question.5.39.217.77:88982 e/ e9 f" C; z9 S1 L1 O
Let x = Male, y = Female, z = Child
' e: B  r  E, {% V0 k2 m+ G: @5 t6x + 3y + z/2 = 100   Formula 1
/ g, L- q- B; [8 K5 N5.39.217.77:8898x + y + z = 100    Formula 2公仔箱論壇: g& {+ l+ ?7 x9 f" C
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
- r- W3 r) `0 R, e5.39.217.77:8898Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
% R$ G+ a1 q8 U3 I  m2 L5.39.217.77:8898Formula 4 can change into 11x + 5y = 100 Formula 5TVBNOW 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。5 V( m- G6 [- m
In 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。; n" x6 t. D5 E" {# F- 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.
/ @' n# ?7 Q" ~6 L& E9 J$ Z公仔箱論壇Eventually, the answer is 20 female and 80 children and no male.