That is a very simple mathematics question.
2 m) |$ p5 Y* I5 J$ FTVBNOW 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4 u+ O y. c5 X' b, x4 l) x% b8 K9 K
6x + 3y + z/2 = 100 Formula 1TVBNOW 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。7 U" B$ ?" r; t0 g8 K J
x + y + z = 100 Formula 2
- D2 }3 ~% V2 W+ mSimplify Formula 2 into z, we get z = 100 - x - y Formula 3
2 \* z' t, [2 P! s; Fwww1.tvboxnow.comSub 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。/ j# w3 @- Q0 p3 \! G
Formula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇9 N+ M2 W6 ?! j1 R) ^) t; h
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb+ B4 k' w, a/ I* |
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.tvb now,tvbnow,bttvb4 u5 G8 B! X! K1 ^# Y. v
Eventually, the answer is 20 female and 80 children and no male. |