That is a very simple mathematics question.
$ f2 v& B2 h& O5 A; {. V5.39.217.77Let x = Male, y = Female, z = Child
. Z9 s5 z) n8 y( gtvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1
Y. r/ i: B; H! u, Stvb now,tvbnow,bttvbx + y + z = 100 Formula 24 ?1 ]* l9 M- O+ V
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3* @- v1 T& U3 l5 b7 L/ H
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb" _$ v( G* [# o c8 v
Formula 4 can change into 11x + 5y = 100 Formula 5
1 t8 Z/ u n2 U2 A4 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。In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.5.39.217.779 S/ v# v/ [: Q! Q; _5 N4 Q0 |
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8 Z% E. c/ S; W/ j/ L
Eventually, the answer is 20 female and 80 children and no male. |
發表於 2007-10-13 05:40 PM
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