That is a very simple mathematics question.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。/ E9 o& d. f$ X, u4 z' ?* e
Let x = Male, y = Female, z = Child
- J; O8 ~% c3 _5 M+ F- t$ Z公仔箱論壇6x + 3y + z/2 = 100 Formula 1
1 i& d+ ?+ y; R* K& h( x j- _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。x + y + z = 100 Formula 23 B0 Y# t. f. |8 f9 a- O; _- n1 c4 o
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3TVBNOW 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。" m8 {$ C2 B: l% d4 T) n& [* e1 x
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
, o8 }4 ~4 d o2 g4 ~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。Formula 4 can change into 11x + 5y = 100 Formula 5
* l3 X* U* P$ MTVBNOW 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。In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇 ^/ W; F0 g1 ]( G0 R+ L b6 D
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., K7 O* O) e. C6 f; s" o ^& [6 ?
Eventually, the answer is 20 female and 80 children and no male. |