That is a very simple mathematics question.
1 J8 ~/ a: r4 b) |" }2 x) J" fwww3.tvboxnow.comLet x = Male, y = Female, z = Child公仔箱論壇/ A9 t! m4 S" q. ^5 g0 a6 o: O
6x + 3y + z/2 = 100 Formula 1
! Z& }7 k& k) j0 Zx + y + z = 100 Formula 2www3.tvboxnow.com# G. w9 B6 [ [ q8 u
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
' a. U2 Y3 `) \7 i/ p- y3 cwww3.tvboxnow.comSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
8 v2 k1 e4 @1 S1 \5 ^ J( m8 [4 eFormula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇/ q& J) w" R* [
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
9 B' o% i; [+ a8 ^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.
% _+ j b% z2 w% F! dTVBNOW 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。Eventually, the answer is 20 female and 80 children and no male. |