That is a very simple mathematics question.
( G% F; g" R5 H. n( F% L# lTVBNOW 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。Let x = Male, y = Female, z = Child公仔箱論壇. B; [! P4 }+ c9 {
6x + 3y + z/2 = 100 Formula 1
3 V9 b: E5 D0 z( q5 y' ~www2.tvboxnow.comx + y + z = 100 Formula 2
/ _$ b" f3 ?/ f, e0 B8 QSimplify Formula 2 into z, we get z = 100 - x - y Formula 3www2.tvboxnow.com$ @( I. r" a7 u# A; \7 o" S. L
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4TVBNOW 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。2 p: |: S; I/ l* [
Formula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇7 A' S( i. R' E- z2 @2 }0 d2 Y
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
$ ?" {, f3 N8 ]# G1 Kwww2.tvboxnow.comAnd 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.www2.tvboxnow.com! q% p% h: r$ p- b
Eventually, the answer is 20 female and 80 children and no male. |