That is a very simple mathematics question.5 L7 M J m, F5 M, a+ l
Let x = Male, y = Female, z = Childwww2.tvboxnow.com( @1 f4 e! u4 K5 D' S( y$ g0 N* s$ j
6x + 3y + z/2 = 100 Formula 1TVBNOW 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。( w/ ~5 ?8 |5 P
x + 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。$ U3 }6 c4 A5 w2 n R& j+ N8 H
Simplify Formula 2 into z, we get z = 100 - x - y Formula 3
: O8 f/ w& u- h, ^8 Q5 X- q, vtvb now,tvbnow,bttvbSub Formula 3 into Formula 1, we get 6x + 3y + ( 100 - x - y )/2 = 100 Formula 4
) C7 g1 f! \5 YTVBNOW 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。Formula 4 can change into 11x + 5y = 100 Formula 5
6 I3 q/ m; M7 v% A! ?9 w5 eIn Formula 5, x can only be 0 - 9, otherwise y will be negative number which we dont want.
. V2 K: O& S, G( f$ Ctvb now,tvbnow,bttvbAnd 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.
! M' ?6 l1 E- o/ q% b* D8 ?8 \tvb now,tvbnow,bttvbEventually, the answer is 20 female and 80 children and no male. |
發表於 2007-10-13 05:08 PM
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