That is a very simple mathematics question.tvb now,tvbnow,bttvb1 ]: p9 a1 a0 G! T) R* q
Let x = Male, y = Female, z = Child
' d3 v' \/ g9 Bos.tvboxnow.com6x + 3y + z/2 = 100 Formula 1
7 s1 v2 c' E B+ ios.tvboxnow.comx + y + z = 100 Formula 2公仔箱論壇% l' ]* y8 s; M) \9 n
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
# G, H( J. i: T! \3 A# Ktvb now,tvbnow,bttvbSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
% D i( h+ Q" d4 Htvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 5
8 {8 ? f; ~+ L# x% G, A8 o" Y公仔箱論壇In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.TVBNOW 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。! P4 O+ }2 w8 ~% m
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.
# q# D. s3 |$ x/ r8 u8 [) vEventually, the answer is 20 female and 80 children and no male. |