That is a very simple mathematics question.
- x! {. T1 W+ H公仔箱論壇Let x = Male, y = Female, z = Child& E0 j) b1 Z5 y- `
6x + 3y + z/2 = 100 Formula 1
, T$ R. U- ]$ _( s3 p) s/ ix + y + z = 100 Formula 2tvb now,tvbnow,bttvb3 z* J% k! ~8 j
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3% T, }5 c2 M/ Z. Y4 _
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
2 T# ^9 _2 \1 x5.39.217.77:8898Formula 4 can change into 11x + 5y = 100 Formula 5
. x9 z3 K, J6 F2 b/ D' UTVBNOW 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.
6 J/ k/ h) a1 o' t; d9 H; B: vAnd 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.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。& x0 Y2 n6 C8 z9 G/ p0 B
Eventually, the answer is 20 female and 80 children and no male. |