That is a very simple mathematics question.5.39.217.767 \1 j; P, e( p2 V# P
Let x = Male, y = Female, z = Child ( \. F; \" P0 m+ C; K7 I/ o6x + 3y + z/2 = 100 Formula 1TVBNOW 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。- N% O& B% L# D% E$ T3 p
x + y + z = 100 Formula 2TVBNOW 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。 E5 g! r- ?5 O) @
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb6 z* e& C( J, J' r
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4+ n6 }7 c* N' r0 I& B' J0 M
Formula 4 can change into 11x + 5y = 100 Formula 5 J4 }2 s$ w- w- I! G6 ?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。In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. " r- G. }: ~7 ]: Wtvb 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. 9 [9 _. `& X1 _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
原帖由 twinsdragon 於 2007-10-13 05:40 PM 發表 5.39.217.76! I8 ~: ]6 C. j; {7 }# y( K% r
11x + 5y = 100 Formula 5
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。6 r2 W8 y4 a* Z1 L
11X must be 0 or multiple of 5 3 b& @, H% |& R5 D( q) Z3 g' m, Uthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 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。8 Q) U* D+ J4 g, c+ A
5 male 公仔箱論壇7 n4 T) t4 }* I$ T# `4 G3 N7 u P
9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM