That is a very simple mathematics question.
7 i% b5 X- O. S# N; Jtvboxnow.comLet x = Male, y = Female, z = Child
8 w9 f g, A/ }, Ktvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1公仔箱論壇1 g! z) J+ K7 r$ I i& J
x + y + z = 100 Formula 2" D3 x1 R- t F! q! q" `
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3/ ^' k' F1 ~. r9 J ~' T
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
+ b6 D# C6 s2 c+ L) ?- w2 n5 cFormula 4 can change into 11x + 5y = 100 Formula 5
' t U' f5 L+ k: y9 d4 itvb now,tvbnow,bttvbIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.TVBNOW 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。1 m) Z7 E X9 {4 e
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.
4 l) E e' p/ ]TVBNOW 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。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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