That is a very simple mathematics question. + z6 Z$ Y4 ?0 m, \5 d+ ?tvb now,tvbnow,bttvbLet x = Male, y = Female, z = Child( B- l- T0 z% t0 ~+ V
6x + 3y + z/2 = 100 Formula 1 ' f8 f# x( b6 g$ B. L+ ^* p7 ^x + y + z = 100 Formula 2 `, V6 [' @/ B" @5 `+ {8 j: r0 Q HSimplify Formula 2 into z, we get z = 100 - x - y Formula 33 r6 b( p% R5 v" ~
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 % H$ v2 H+ I' K& N Q# iFormula 4 can change into 11x + 5y = 100 Formula 5 # N4 V$ x$ l( F- VIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb7 P1 q/ ]; t9 G. O
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 N: i2 Q4 M+ D4 n% _: M3 s
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,children % B" @, G( K' z" ^5 [8 p$ x) t) U公仔箱論壇0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM