That is a very simple mathematics question.
/ S2 h* L1 h. U4 i+ B+ A4 R: l公仔箱論壇Let x = Male, y = Female, z = Child( l7 g7 ^. i, q
6x + 3y + z/2 = 100 Formula 1& o% B; I( h; i, N; O- U, c. T( \$ H
x + y + z = 100 Formula 2
1 _* e7 E; |. @' u& H3 LTVBNOW 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。Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
- H5 _2 a \& k; a& [! ATVBNOW 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。Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb, P1 {6 l9 R' {, r9 v0 T
Formula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇) X* g! T5 s* a' r3 ?/ b" |; I
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。 B3 T9 C, y1 B n, ^
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.
; j, i, H7 p y. i' s公仔箱論壇Eventually, the answer is 20 female and 80 children and no male. |
發表於 2007-10-13 05:08 PM
| 
