That is a very simple mathematics question. 6 \$ T6 D& K8 v9 HTVBNOW 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 # z; V5 g( o# q+ H& [: _6x + 3y + z/2 = 100 Formula 15.39.217.76* N+ E9 {. M2 Y ?
x + y + z = 100 Formula 2tvb now,tvbnow,bttvb# N4 b' Q" Y% {8 J+ [- ` i* q0 k& G
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 ; B1 S9 f) m" P. s6 j5 R* bTVBNOW 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。Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 ' X8 ~# Q* i3 g1 Y' [4 k1 h' bFormula 4 can change into 11x + 5y = 100 Formula 5' a3 J7 e. G; m Z
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.: H: z: Y+ T( e, J& {" t- `- r
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. / I+ \. e6 D( R+ w/ w i5.39.217.76Eventually, 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