That is a very simple mathematics question.
2 q6 I5 t- ?- g: r/ Y公仔箱論壇Let x = Male, y = Female, z = Child
* f" i7 { A1 W' D5 K s3 sTVBNOW 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。6x + 3y + z/2 = 100 Formula 1
3 |( R# ?! n' P5 X" L) XTVBNOW 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。x + y + z = 100 Formula 2公仔箱論壇8 {! c* @+ M1 w
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇- |% O o' R/ l' O% H
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4TVBNOW 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。$ ^$ a" y. P$ a
Formula 4 can change into 11x + 5y = 100 Formula 5
! h7 ^% Q ~. h7 {& ] I# u" q* [公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.6 [3 Q& ~# _, H; Q- L2 J2 n9 A
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' W) u+ ]2 B8 c d0 S
Eventually, the answer is 20 female and 80 children and no male. |
發表於 2007-10-13 05:08 PM
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