That is a very simple mathematics question.
& n: {1 D: O( M+ kTVBNOW 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。Let x = Male, y = Female, z = Child& b7 O9 b7 c" j
6x + 3y + z/2 = 100 Formula 1
& n; i' ?; \" n) _: N公仔箱論壇x + y + z = 100 Formula 2
3 q" T; ~. y2 q4 V7 ^; s6 x5 wSimplify Formula 2 into z, we get z = 100 - x - y Formula 3公仔箱論壇0 {, x5 Y! W% o
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
5 S( d1 U. m* _% k p3 d; `! E5.39.217.77Formula 4 can change into 11x + 5y = 100 Formula 5
; W$ ]3 S; k( U9 f+ ?, }公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.2 s; V% ~+ G5 C5 y5 p3 U
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.
. d# s0 T# T6 V' E/ u8 w( z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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