That is a very simple mathematics question.
1 N8 X% n( k+ F rLet x = Male, y = Female, z = Child
$ i7 P" g9 P% C B) A( ^4 T( ttvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1+ l5 A! r9 e! N9 P. H
x + y + z = 100 Formula 2公仔箱論壇) T* ?# H1 t8 s3 \4 @3 h5 C9 A2 |
Simplify Formula 2 into z, we get z = 100 - x - y Formula 38 e% k4 ?. v* d1 o+ |- S% F3 i. c
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
, L, ], x/ w+ Q9 a# v公仔箱論壇Formula 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。' e8 ?1 U: A& o0 B* H
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.% ]" e. c/ Z4 ]: r- 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.tvb now,tvbnow,bttvb7 e6 E. d: _7 D* q5 Y$ F4 I0 J
Eventually, the answer is 20 female and 80 children and no male. |