That is a very simple mathematics question.
6 P& v" K7 z% _6 x9 ?/ A, v4 GLet x = Male, y = Female, z = Child
6 i$ [4 R3 ~( e' p! V( J6x + 3y + z/2 = 100 Formula 1
, D3 y5 d: d6 w4 e5.39.217.77x + y + z = 100 Formula 25.39.217.77& R( K2 |( N4 N' J; E5 |% ]
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。 e" c! m- N$ `- t
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
7 {) X0 {* B+ h$ L0 W4 _: @" \5.39.217.77Formula 4 can change into 11x + 5y = 100 Formula 5tvb now,tvbnow,bttvb- A' c7 o9 E h
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb5 Q2 b- o m! S3 F+ l1 R6 g
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.
P) l7 x6 [/ {. S/ r+ mEventually, the answer is 20 female and 80 children and no male. |