That is a very simple mathematics question. 2 q- M! v2 e! Y6 T9 HLet x = Male, y = Female, z = Child# p6 H+ N, B' \- x
6x + 3y + z/2 = 100 Formula 1 y( x7 t, S& z2 G* ?, Yx + y + z = 100 Formula 21 Y! A5 r5 n- m& J
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 , e* B9 O/ n& L$ f! o4 ctvb now,tvbnow,bttvbSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4TVBNOW 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。# U2 d* [$ }* ?4 x
Formula 4 can change into 11x + 5y = 100 Formula 5 ' p4 n; W# U& H& |# u {5 @公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.! R8 M4 L/ Z$ w/ M& @
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. 0 k6 M: r6 \3 N/ t; \5 w6 Y3 tEventually, 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。 L5 d5 K0 b: o
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM