That is a very simple mathematics question. 9 x T: I7 k2 u* E# o% iLet x = Male, y = Female, z = Child5.39.217.76. Q+ F" W& y9 F7 Z
6x + 3y + z/2 = 100 Formula 1% W J- [* |/ C3 [
x + y + z = 100 Formula 2公仔箱論壇7 c; Z- l8 T+ l" S, {
Simplify Formula 2 into z, we get z = 100 - x - y Formula 37 O8 a. |9 f2 ?' C2 K n7 T7 x
Sub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4 ! x' \; Q" @* L; N; p( P; a* Q+ |0 x) }Formula 4 can change into 11x + 5y = 100 Formula 5TVBNOW 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。: H& J0 w. \6 u
In 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。1 i- x6 q; T# R( 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 = 80.1 R5 ~- F1 Z$ h
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
man,female,children 6 R* `! w. K) T0 k/ Q1 `8 f# |公仔箱論壇0,20,80 or 5,9,86作者: RyanC 時間: 2007-10-14 10:46 PM
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11X must be 0 or multiple of 5 ) i( U& L: o5 g+ m p q9 Athat meanz x must be 0 or 5作者: manstein 時間: 2007-10-15 08:28 PM