That is a very simple mathematics question.tvboxnow.com; ^* k H3 e4 [ A' O, h# z6 x
Let x = Male, y = Female, z = ChildTVBNOW 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。8 s' h+ R, p* B' x9 p( ?
6x + 3y + z/2 = 100 Formula 1tvboxnow.com& S# g% w% c- t$ o: @
x + y + z = 100 Formula 2
4 }. A9 K! e3 U: Qtvboxnow.comSimplify Formula 2 into z, we get z = 100 - x - y Formula 3
# T( q5 g; |0 d公仔箱論壇Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4; L' ]! }1 Z$ L. Z Q
Formula 4 can change into 11x + 5y = 100 Formula 5公仔箱論壇2 @' h. N: r/ Z/ v9 b; R( e$ z
In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
& v% ?6 N! x3 Z* eAnd 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.公仔箱論壇6 Z: g. Z7 U! y. }, n& O3 i, h; ]
Eventually, the answer is 20 female and 80 children and no male. |