That is a very simple mathematics question.tvb now,tvbnow,bttvb. r8 @8 K1 _8 f$ S: y
Let x = Male, y = Female, z = Child公仔箱論壇" `' J: Q; `0 l5 T8 V2 ?/ S
6x + 3y + z/2 = 100 Formula 1
" f; b( f4 h6 X/ ]公仔箱論壇x + y + z = 100 Formula 2tvb now,tvbnow,bttvb2 L4 O+ R/ U8 o4 N5 J
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
8 m; k9 \* I5 y) i$ F7 W8 z" ftvb now,tvbnow,bttvbSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4, q; M' {% X8 l8 [0 ]/ V. K; _
Formula 4 can change into 11x + 5y = 100 Formula 5TVBNOW 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。2 }( n+ r. Z6 F" G. S8 P; ]8 V8 X7 A( l
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
; b$ @- t" E T; I8 ]7 g. r! ?tvb now,tvbnow,bttvbAnd 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.
# g2 [6 e$ B5 R5 j1 I: q' mtvb now,tvbnow,bttvbEventually, the answer is 20 female and 80 children and no male. |
發表於 2007-10-13 05:08 PM
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