That is a very simple mathematics question. ( F _7 i1 A8 t- s* ?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。Let x = Male, y = Female, z = Child 8 t* \- F9 w9 e2 G; x- t! ntvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1 6 {- a; o' a% z: D4 z5 j% Q公仔箱論壇x + y + z = 100 Formula 2 6 ^5 @% F' L7 ]3 ntvb now,tvbnow,bttvbSimplify Formula 2 into z, we get z = 100 - x - y Formula 3 P/ M- Y! ~& x( x$ S4 C, D/ s6 \' xSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4公仔箱論壇. G8 i/ P3 w. N+ j! E
Formula 4 can change into 11x + 5y = 100 Formula 55.39.217.76; i" h, B4 |+ [
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.- I0 R9 q. I3 f e7 M' Q, `8 F
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. 1 P: g( q+ b' \* d3 WEventually, 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