That is a very simple mathematics question. ! p0 y/ m# J' N1 Q7 i! l9 v$ B1 wLet x = Male, y = Female, z = Child& U7 @8 q7 ~. \8 _0 D
6x + 3y + z/2 = 100 Formula 1tvb now,tvbnow,bttvb" z- ^* [4 c. T& X; l6 S
x + y + z = 100 Formula 2. @3 F1 t' ~! \5 y* `6 R! N: F6 y% l
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3tvb now,tvbnow,bttvb% ~" K, G+ h1 r: f* Q
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 ; |$ A6 p8 ]( `; Ltvb now,tvbnow,bttvbFormula 4 can change into 11x + 5y = 100 Formula 5 ! a/ g( c" @% H6 L( @0 ~# OTVBNOW 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.公仔箱論壇, R9 Z# z2 q& P7 ~0 j1 L
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. 7 A Q8 ~$ A+ t% y0 ^$ `0 U" H公仔箱論壇Eventually, the answer is 20 female and 80 children and no male.作者: alan1234 時間: 2007-10-14 12:19 AM 標題: two answers
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0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM