That is a very simple mathematics question.
" G2 W# {& N$ n9 j1 Q0 a9 |0 h公仔箱論壇Let x = Male, y = Female, z = Child- i$ X% k4 Y& Y# J! l/ j" x# {- v' l
6x + 3y + z/2 = 100 Formula 1: F A3 ^& C6 U. B3 V
x + y + z = 100 Formula 2
! \# e" m: u* ^' D9 u) j公仔箱論壇Simplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇4 u* u3 O+ i8 B7 S" V
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4" P5 ]5 M- D; k( M! s# w, v" b
Formula 4 can change into 11x + 5y = 100 Formula 5
$ c9 @7 O- h2 U2 ?: BTVBNOW 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.8 _0 P, _ B2 q: h6 m. Z2 j
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.tvb now,tvbnow,bttvb u; r" ^& x# K! k, d6 |
Eventually, the answer is 20 female and 80 children and no male. |