That is a very simple mathematics question.5.39.217.76, U6 U' ~" e' _* v
Let x = Male, y = Female, z = Child - @. o" ]+ \4 d, ~: \# Mtvb now,tvbnow,bttvb6x + 3y + z/2 = 100 Formula 1 - n, }& _0 ?- U! btvb now,tvbnow,bttvbx + y + z = 100 Formula 2 ( o0 k9 Q( v. T4 f4 m6 @ D5.39.217.76Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb/ N4 D2 B6 b: g
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 % f- d( Z( F9 w6 z, W5.39.217.76Formula 4 can change into 11x + 5y = 100 Formula 5 . Y3 X, G1 h! S+ [4 ~5.39.217.76In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want. + F) N) w/ @$ ?7 j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. * i1 p! ?* d, u; w' G$ M* S F6 qEventually, 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/ o/ k% M, @' o2 }3 M
0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
