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。) |7 ^. ]* f9 T; u& Z
Let x = Male, y = Female, z = Child
8 s- ^6 e% \5 V) I8 z+ B9 R公仔箱論壇6x + 3y + z/2 = 100 Formula 15.39.217.77' }3 s1 H3 n: G- X% H% l5 z( f
x + y + z = 100 Formula 2
, W& j- J ]0 Q4 r$ Q$ N( I$ itvb now,tvbnow,bttvbSimplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.77: P6 _7 t5 F/ X. e) C+ i
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
! N9 k2 a% D' u2 \2 i% H* R& I! qTVBNOW 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
! r/ }2 G0 D9 h Z" y+ r9 ?7 C7 R5.39.217.77In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
; n+ @0 a) z! G- xAnd 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 = 80.6 \8 F+ T! O: O, ~" S8 E8 O3 K
Eventually, the answer is 20 female and 80 children and no male. |