That is a very simple mathematics question.5 Q5 U. S S( d7 U( f1 [# i( z
Let x = Male, y = Female, z = Child公仔箱論壇; p) s. H* Z7 `( k/ e0 h
6x + 3y + z/2 = 100 Formula 1( v* X* `0 F( q. c5 S" y7 t
x + y + z = 100 Formula 25.39.217.76( ^0 Z/ q, P' i ]* s- N( s' d M
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
7 F$ s5 C5 x- ^4 o- q公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
! m# B) @* M0 u+ [; h+ k5 [5.39.217.76Formula 4 can change into 11x + 5y = 100 Formula 5tvb now,tvbnow,bttvb& a: X5 L8 S/ ^/ {5 f# J" ?
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.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。" W! d3 D' |/ M( C5 t
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.公仔箱論壇' o' r0 `3 A) m& n4 y: q$ K7 e# {
Eventually, the answer is 20 female and 80 children and no male. |