That is a very simple mathematics question.
+ @+ M1 j0 W1 P# |3 O公仔箱論壇Let x = Male, y = Female, z = Child
; C0 X# d8 s6 @; m5 M6 X6x + 3y + z/2 = 100 Formula 1
. z, U% k* @0 F: vTVBNOW 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。x + y + z = 100 Formula 2tvb now,tvbnow,bttvb: |. F2 E2 H) k1 t! M: @& v
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3www3.tvboxnow.com, s& K, Z" S/ Z! K+ V
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
% C0 W: b9 s' X$ c. K2 A1 Z2 \- h' OFormula 4 can change into 11x + 5y = 100 Formula 5www3.tvboxnow.com& |" y: A# k o8 s, l4 _# A
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
, p. a. q3 [& M# f, W& Htvb now,tvbnow,bttvbAnd 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.
. Z; _" ]! J4 Z; U# S! T- swww3.tvboxnow.comEventually, the answer is 20 female and 80 children and no male. |