That is a very simple mathematics question.公仔箱論壇2 Q q3 ?2 u4 {
Let x = Male, y = Female, z = Child公仔箱論壇! U5 n# ?; _" E- l# y' o
6x + 3y + z/2 = 100 Formula 1公仔箱論壇! o; G) |7 [5 G: ?% I& t' q H* r* F' J
x + y + z = 100 Formula 25.39.217.76' ^4 w( l% y6 ^
Simplify Formula 2 into z, we get z = 100 - x - y Formula 34 q6 q B9 ?( M
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 5 R5 s: \) r6 y2 j5.39.217.76Formula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇* Q: X& o/ u$ e: N. _$ ~! s: V/ V
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want." W7 m/ J! V# b$ s
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.) v/ o! J" m5 i" ~" k
Eventually, the answer is 20 female and 80 children and no male.作者: alan1234 時間: 2007-10-14 12:19 AM 標題: two answers
man,female,childrenTVBNOW 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。5 e3 L5 y! W; y: F
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 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。+ h W- {0 r3 {; v1 ?& s; v
11x + 5y = 100 Formula 5
tvb now,tvbnow,bttvb( s& g0 w% G: S( B( I
11X must be 0 or multiple of 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。3 a2 |# ~9 E5 c# Y) Y' F( r# J
that meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM