That is a very simple mathematics question.2 U) z' w9 I0 ]* `9 F
Let x = Male, y = Female, z = Child ) L- G C/ p3 m! E5.39.217.766x + 3y + z/2 = 100 Formula 1, [. }) X0 ?) [* H0 f
x + y + z = 100 Formula 27 v6 a- b, h$ g$ N
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3 ( T9 j4 C4 j" \3 S3 u. YSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4tvb now,tvbnow,bttvb3 d8 c$ m# E3 c- H3 L# R
Formula 4 can change into 11x + 5y = 100 Formula 5tvb now,tvbnow,bttvb& _8 l8 L- a' R! b$ j- r7 o# Q
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. ' R4 o( `$ m* b8 ^公仔箱論壇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 = 80.5.39.217.761 k6 c7 F% I$ w2 ]
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; M3 _0 M; i0 i2 _
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
6 j- N8 K) h$ n0 ?. X公仔箱論壇11X must be 0 or multiple of 5 0 l6 t+ m1 X f2 W9 r7 etvb now,tvbnow,bttvbthat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM
86 children5.39.217.76% e/ I2 b! U/ j8 \: Z$ C' @5 H
5 male F/ y. E) F0 u% n公仔箱論壇9 female作者: dafunhei123 時間: 2007-10-15 10:39 PM
