twinsdragon

That is a very simple mathematics question.( j+ a) w% y" |
Let x = Male, y = Female, z = Child
0 b# P4 W) p- q公仔箱論壇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。+ w5 R9 H4 a1 J
x + y + z = 100    Formula 2
; f8 ?0 F) p5 q  ySimplify Formula 2 into z, we get z = 100 - x - y Formula 3
, O2 i, H& \% b  s. X7 u, p) KSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
1 P# Q% o$ o( v! k# c7 V& u5 uFormula 4 can change into 11x + 5y = 100 Formula 5& S$ H! s: ~9 N% K5 L7 L1 M
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
1 F1 k5 X5 u, l2 U7 x3 Mwww2.tvboxnow.comAnd 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.) M$ ]# u/ i5 w
Eventually, the answer is 20 female and 80 children and no male.