twinsdragon

That is a very simple mathematics question.( W4 ?; _- E4 |. h& h5 [6 i/ Q
Let x = Male, y = Female, z = Child
2 u+ \( @$ Z9 V+ S. Q9 F2 i" @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 15.39.217.766 t* e( Y+ v/ E: z6 {" t2 ]
x + y + z = 100    Formula 2公仔箱論壇' U8 L: l' o2 w% n4 q" U& p
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
2 e) o& a: v$ ?公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 42 ~- ?* C3 @5 A+ L. p) u
Formula 4 can change into 11x + 5y = 100 Formula 5tvb now,tvbnow,bttvb3 W2 }( @2 i! S4 h* i
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb& u5 b9 F( k( k1 U/ |& K& l' u7 b" \; Y
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.
8 g* o2 j; J" j) c! LTVBNOW 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。Eventually, the answer is 20 female and 80 children and no male.