That is a very simple mathematics question.
$ }; V3 O0 ]8 O N) O公仔箱論壇Let x = Male, y = Female, z = Child公仔箱論壇' K, v6 P1 D) H
6x + 3y + z/2 = 100 Formula 1- S" _2 S" J: I! w/ V
x + y + z = 100 Formula 2( Z. w* y4 [& G$ |* {3 \/ |2 \
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
" q& v" u0 U% v; B5.39.217.77Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
" t; p( q- j9 _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。Formula 4 can change into 11x + 5y = 100 Formula 5+ A% S+ E* w) f2 `, W
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.公仔箱論壇* W* W! F' @' J8 |/ E' k
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.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。2 P3 V& X7 E7 L. I7 f
Eventually, the answer is 20 female and 80 children and no male. |