That is a very simple mathematics question. ( h+ P, x3 f5 S" ` h* h公仔箱論壇Let x = Male, y = Female, z = ChildTVBNOW 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。. \& [' T1 ~# d, ?5 w) P# h
6x + 3y + z/2 = 100 Formula 1tvb now,tvbnow,bttvb7 c0 t+ n$ \* N" [
x + y + z = 100 Formula 2 $ ^$ U- H& s* L. a* OSimplify Formula 2 into z, we get z = 100 - x - y Formula 35.39.217.765 S7 A" x. s7 r+ Z
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4" f. t/ a( ], I H: K$ W4 M
Formula 4 can change into 11x + 5y = 100 Formula 5 # }$ M4 Q4 C \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。In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb. I# o1 [8 V1 d1 G5 F& x
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 = 80.5.39.217.76: c- W. Y( D0 F; w6 s) x f
Eventually, the answer is 20 female and 80 children and no male.作者: alan1234 時間: 2007-10-14 12:19 AM 標題: two answers