That is a very simple mathematics question.
( \0 o2 J+ E, }* D E5 e2 L, X公仔箱論壇Let x = Male, y = Female, z = Child公仔箱論壇5 [& J7 x. m* T/ B
6x + 3y + z/2 = 100 Formula 1
6 I5 R4 U' h0 h0 V2 C4 j! r9 \$ ` }$ rx + y + z = 100 Formula 2TVBNOW 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。; m, @9 @& A+ F5 I3 q
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
. d3 B: v4 }5 y- D0 i" I* e3 I( u$ vtvb now,tvbnow,bttvbSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 41 `' u. E! Q E/ @2 ]
Formula 4 can change into 11x + 5y = 100 Formula 5
( N# c/ @6 H0 }- A! XTVBNOW 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。In Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.tvb now,tvbnow,bttvb* Y7 S" k e/ _% i' X3 F/ g
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.) x% U8 r3 W4 ~5 E
Eventually, the answer is 20 female and 80 children and no male. |