That is a very simple mathematics question.
& a7 M5 @0 w/ r5 ZLet x = Male, y = Female, z = ChildTVBNOW 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。8 ^2 W9 X4 ^4 O* d/ g
6x + 3y + z/2 = 100 Formula 1公仔箱論壇4 e( G- Y1 |! P0 Z* x) g
x + y + z = 100 Formula 2" D/ x- W( F; _" w& F$ H/ f; u
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
) t" a: i y% e8 @5 o3 Etvb now,tvbnow,bttvbSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
3 C; {2 i5 c3 v5 K+ QFormula 4 can change into 11x + 5y = 100 Formula 5$ `% N" Y- R# g9 ]
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
# ^) X! {. \% d1 ~4 J* DAnd 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 I3 V" `* L* f" o! n6 g' zTVBNOW 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. |