That is a very simple mathematics question.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。. U6 G5 T$ w* P5 D" v/ W% d6 f6 o9 t
Let x = Male, y = Female, z = Childtvb now,tvbnow,bttvb) V% K# A& U7 f* W
6x + 3y + z/2 = 100 Formula 1公仔箱論壇! Y7 }2 I, ~' O1 ^4 Z+ q
x + y + z = 100 Formula 2
; U6 w2 s" Z ISimplify Formula 2 into z, we get z = 100 - x - y Formula 3( S6 Z- V3 l! \ u d/ _0 D
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
' W: Z. m/ d2 ^+ ?; ^" Htvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 5
7 b+ w& c' j+ qtvb now,tvbnow,bttvbIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.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。! D1 R1 q' I% S/ P
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 = 80.1 w: S: A9 }" K' C
Eventually, the answer is 20 female and 80 children and no male. |