That is a very simple mathematics question.
% ]" ^* @3 x: E: {公仔箱論壇Let x = Male, y = Female, z = Child# v8 j$ ~3 v" n2 [0 m
6x + 3y + z/2 = 100 Formula 1tvb now,tvbnow,bttvb/ [0 O) k. X# t# s [
x + y + z = 100 Formula 2tvb now,tvbnow,bttvb- G. k1 G- {, a8 b
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
; Q2 p2 c/ |7 L- ?公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 45.39.217.761 ]2 X' O, z3 M. r' K0 o4 V
Formula 4 can change into 11x + 5y = 100 Formula 53 V; w6 N* ^: G) u# r4 n
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
) ^' I2 N0 F8 j% H9 `: TTVBNOW 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。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 s6 L; f5 `9 w) p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
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