That is a very simple mathematics question.tvb now,tvbnow,bttvb% Q% q8 @0 @2 \ O! h1 c! \
Let x = Male, y = Female, z = Child5.39.217.77:8898) X! q4 _8 W) m$ r; e& m
6x + 3y + z/2 = 100 Formula 1
. q( ~' K8 `; Q) R+ S8 j Vx + y + z = 100 Formula 25.39.217.77:8898/ ]& n/ _3 v( A n% Y& Q }5 w& ?
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。7 d5 I5 {, q; C6 e+ n
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
7 z; r: R* G, m: M- r3 ATVBNOW 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
* C4 H' m$ B5 q1 T9 A( n; Q公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇5 K9 s( L4 Y4 t5 F
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.
* ]' T+ D; B9 X0 f* hEventually, the answer is 20 female and 80 children and no male. |